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Topical›Chemistry 9701›The Periodic Table: chemical periodicity›Periodicity of chemical properties of the elements in Period 3›Paper 1

Periodicity of chemical properties of the elements in Period 3 — Paper 1 · A Level Chemistry 9701

9.2· 180 questions · 180 marks · 216 min · 2005–2025· Multiple choice

Every Cambridge A Level Chemistry Paper 1 question on periodicity of chemical properties of the elements in period 3, laid out as 40 A4 pages with the mark scheme below. Nothing is left out. Free to read, no account.

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Question 1: One mole of magnesium, aluminium and sulphur are each completely burned in an excess of oxygen gas. Which graph shows the moles of oxygen u…Question 2: The oxide and chloride of an element X are separately mixed with water. The two resulting solutions have the same effect on litmus. What is…Question 3: Steam is passed over heated magnesium to give compound X and hydrogen. What is not a property of compound X? A It has a high melting point.…Question 4: In an experiment, 0.1 g samples of Na2O, MgO, P4O10 and SO2 are added to separate 100 cm3 volumes of water. For which oxide is the resultin…Question 5: Which oxide, when mixed with water, will produce the most acidic solution? A CO B CO2 C SiO2 D P2O51 / 40
Question 6: Which statement correctly describes what happens when silicon tetrachloride is added to water? A The SiCl4 dissolves to give a neutral solu…Question 7: The oxide and chloride of an element X are separately mixed with water. The two resulting solutions have the same effect on litmus. What is…Question 8: Which element of the third period requires the least number of moles of oxygen for the complete combustion of 1 mol of the element? A alumi…Question 9: Two properties of non-metallic elements and their atoms are as follows. property 1 has an oxide that can form a strong acid in water proper…Question 10: Which element of the third period requires the least number of moles of oxygen for the complete combustion of 1 mol of the element? A alumi…2 / 40
Question 11: Two properties of non-metallic elements and their atoms are as follows. property 1 has an oxide that can form a strong acid in water proper…Question 12: Two properties of non-metallic elements and their atoms are as follows. property 1 has an oxide that can form a strong acid in water proper…Question 13: Which element of the third period requires the least number of moles of oxygen for the complete combustion of 1 mol of the element? A alumi…Question 14: Which property of beryllium and its compounds is typical of the elements below it in Group II? A Be does not react with hot water. B BeCl2 …3 / 40
Question 15: Steam is passed over heated magnesium to give compound X and hydrogen. What is not a property of compound X? A It has an Mr of 40.3. B It …Question 16: Which statements are correct? 1 Aluminium chloride dissolves in water to give an acidic solution. 2 Magnesium chloride dissolves in water t…Question 17: Which oxides react with water to give a solution of pH 10 or higher? 1 CaO 2 Na2O 3 SrO4 / 40
Question 18: The highest oxides of the elements sodium to chlorine are separately added to water. Which diagram best represents the pH of the resulting …Question 19: Why does aluminium oxide dissolve in sodium hydroxide solution? A Aluminium oxide can behave as a base. B Aluminium oxide can behave as an …Question 20: Steam is passed over heated magnesium to give compound X and hydrogen. What is not a property of compound X? A It has an Mr of 40.3. B It …5 / 40
Question 21: Which statements are correct? 1 Aluminium chloride dissolves in water to give an acidic solution. 2 Magnesium chloride dissolves in water t…Question 22: Which oxides react with water to give a solution of pH 10 or higher? 1 CaO 2 Na2O 3 SrOQuestion 23: Which element shows the greatest tendency to form some covalent compounds? A aluminium B magnesium C neon D potassiumQuestion 24: In a car engine, non-metallic element X forms a pollutant oxide Y. Further oxidation of Y to Z occurs spontaneously in the atmosphere. In t…Question 25: Which element shows the greatest tendency to form some covalent compounds? A aluminium B magnesium C neon D potassiumQuestion 26: The period 4 elements gallium (Ga), germanium (Ge), arsenic (As) and selenium (Se) are the elements below aluminium, silicon, phosphorus an…6 / 40
Question 27: Use of the Data Booklet is relevant to this question. 1.15 g of a metallic element reacts with 300 cm3 of oxygen at 298 K and 1 atm pressur…Question 28: Elements X and Y are both in period three. When the chloride of X is added to water, it reacts and a solution of pH 2 is produced. When the…Question 29: Which of these substances have a giant structure? 1 silicon(IV) oxide 2 baked clay found in crockery 3 phosphorus(V) oxideQuestion 30: When added to water, which oxides will not cause a change in pH? 1 Al 2O3 2 SiO2 3 P4O10Question 31: Elements X and Y are both in period three. When the chloride of X is added to water, it reacts and a solution of pH 2 is produced. When the…7 / 40
Question 32: Which of these substances have a giant structure? 1 silicon(IV) oxide 2 baked clay found in crockery 3 phosphorus(V) oxideQuestion 33: When added to water, which oxides will not cause a change in pH? 1 Al 2O3 2 SiO2 3 P4O10Question 34: During steel-making the impurity P4O10 is removed by reacting it with calcium oxide. The only product of this reaction is the salt calcium …Question 35: Mohr’s salt is a pale green crystalline solid which is soluble in water. It contains two cations, one of which is Fe2+ and one anion which …Question 36: Which oxide, when mixed with water, will produce the solution with the lowest pH? A CO2 B Na2O C P4O10 D SiO2Question 37: Use of the Data Booklet is relevant to this question. Which statements are correct when referring to the atoms 23Na and 24Mg? 1 They have t…8 / 40
Question 38: Element J is a solid. It occurs as a contaminant of fossil fuels. Its oxide K is formed in car engines. In the atmosphere, K can be further…Question 39: Carbon, nitrogen and sulfur are non-metals. Which statement about their oxides, XO2, is correct? (Where X represents carbon, nitrogen or su…Question 40: Which oxide is insoluble in aqueous sodium hydroxide? A MgO B Al 2O3 C P4O10 D SO2Question 41: Use of the Data Booklet is relevant to this question. Elements J and K react together to form compound L. Elements J and K are both in Peri…Question 42: Which chlorides of Period 3 elements will form a neutral solution when added to water? 1 NaCl 2 Al 2Cl 6 3 PCl 5Question 43: Which description of the bonding and acid / base nature of aluminium oxide is correct? bonding acid / base nature A covalent amphoteric B c…9 / 40
Question 44: X and Y are oxides of different Period 3 elements. If one mole of Y is added to water, the solution formed is neutralised by exactly one mo…Question 45: A student investigated the chloride of a Period 3 element. This is what he wrote down as his record of what he did and what he saw. The com…Question 46: Which properties do compounds of aluminium and silicon have in common? A Aqueous solutions of their chlorides contain aluminium or silicon …Question 47: Element X, in Period 3, has the following properties. ● Its oxide has a giant structure. ● It forms covalent bonds with chlorine. ● Its oxi…Question 48: Which property is not associated with the element sodium? A It can react with cold water to form hydrogen. B It forms a basic oxide. C It f…10 / 40
Question 49: Which oxide does not react with cold dilute sodium hydroxide to produce a salt? A Al 2O3 B P4O10 C SO2 D SiO2Question 50: Element X, in Period 3, has the following properties. ● Its oxide has a giant structure. ● It forms covalent bonds with chlorine. ● Its oxi…Question 51: Which property is not associated with the element sodium? A It can react with cold water to form hydrogen. B It forms a basic oxide. C It f…Question 52: Which oxide does not react with cold dilute sodium hydroxide to produce a salt? A Al 2O3 B P4O10 C SO2 D SiO2Question 53: X, Y and Z are compounds of three elements in Period 3. Their electrical conductivities are shown in the table. X Y Z conductivity of the c…Question 54: An element Y reacts according to the following sequence. burns an excess of in O2 HCl (aq) NaOH(aq) NaOH(aq) Y white solid solution white p…11 / 40
Question 55: One molecule of the oxide of element Z reacts with six molecules of water to produce an acidic compound. What is element Z? A aluminium B p…Question 56: Which observations are made when a sample of silicon chloride, SiCl 4, is added to a beaker of water? A No visible changes are observed. B …Question 57: When added to water, which oxides will cause a change in the pH of the water? 1 SiO2 2 CaO 3 SO2Question 58: Which chloride of a Period 3 element dissolves in water to form a solution with a pH of 7? A aluminium chloride B phosphorus(V) chloride C …Question 59: Consecutive elements X, Y and Z are in Period 3 of the Periodic Table. Element Y has the highest first ionisation energy and the lowest mel…Question 60: Elements D and E are both in Period 3. Element D has the smallest atomic radius in Period 3. There are only two elements in Period 3 which …12 / 40
Question 61: A little water is added to each of the following compounds and the mixture warmed. For which compounds will an acidic gas be evolved? 1 alu…Question 62: The oxide and chloride of an element X are separately mixed with water. The two resulting solutions have the same effect on litmus. What co…Question 63: Water is added to anhydrous aluminium chloride to make a 0.1 mol dm–3 solution. Which observations are correct? 1 The reaction is endotherm…Question 64: Water is added to anhydrous aluminium chloride to make a 0.1 mol dm–3 solution. Which observations are correct? 1 The reaction is endotherm…Question 65: Which chlorides, when added to water, can produce a solution with a pH of less than 5? 1 SiCl 4 2 Al Cl 3 3 MgCl 2Question 66: Magnesium chloride, MgCl 2, and silicon tetrachloride, SiCl 4, are separately added to water. What are the approximate pH values of the sol…13 / 40
Question 67: An element Y reacts according to the following sequence. burns an excess of in O2 HCl (aq) NaOH(aq) NaOH(aq) Y white solid solution white p…Question 68: Element Z has a giant structure. The chloride of Z reacts with water to give a solution with a pH less than 5. Which row shows two elements…Question 69: An element Y reacts according to the following sequence. burns an excess of in O2 HCl (aq) NaOH(aq) NaOH(aq) Y white solid solution white p…Question 70: Which oxide is insoluble in aqueous sodium hydroxide? A MgO B Al 2O3 C P4O10 D SO2Question 71: X, Y and Z are three elements in the third period. ● X reacts with chlorine to give a liquid product. ● Y reacts with chlorine to give a so…14 / 40
Question 72: Silicon is heated in an excess of chlorine, producing compound J. Excess water is added to the sample of J produced. Which row is correct? …Question 73: Which oxide does not react with cold, dilute sodium hydroxide to produce a salt? A Al 2O3 B P4O10 C SO2 D SiO2Question 74: Which description of the bonding and acid / base nature of aluminium oxide is correct? bonding acid / base nature A simple covalent amphote…Question 75: X and Y are elements of the third period. X and Y are individually heated in excess chlorine. Each product is purified and then separately …Question 76: Sodium and sulfur are burned separately in oxygen. Each reaction has a distinctive coloured flame. Which row is correct? Na + O2 S + O2…15 / 40
Question 77: X and Y are elements in Period 3 of the Periodic Table. ● The oxide of X is a solid at room temperature. This oxide has a giant structure. …Question 78: Which observations are made when a sample of silicon chloride, SiCl 4, is added to a beaker of water? A No visible change is observed. B St…Question 79: A sample containing x mol of Al 2Cl 6 is dissolved in water to give solution W. In order to precipitate all of the aluminium as its hydroxi…Question 80: Sodium and sulfur are burned separately in oxygen. Each reaction has a distinctive coloured flame. Which row is correct? Na + O2 S + O2…Question 81: X and Y are elements in Period 3 of the Periodic Table. ● The oxide of X is a solid at room temperature. This oxide has a giant structure. …16 / 40
Question 82: Which row describes the structure and bonding of SiO2 and SiCl 4? SiO2 SiCl 4 bonding structure bonding structure A covalent giant covalent…Question 83: X, Y and Z are elements in Period 3 of the Periodic Table. The results of some experiments carried out with compounds of these elements are…Question 84: A solid Period 3 element, Q, is reacted with oxygen gas. Compound R is formed. When R is added to water the pH decreases. What could be the…Question 85: 1.15 g of a metallic element needs 300 cm3 of oxygen for complete reaction, under room conditions, to form an oxide which contains O2– ions…Question 86: Which oxides, when placed in cold water for one day, will react with the water? 1 MgO 2 Al 2O3 3 SiO217 / 40
Question 87: X is either chlorine or an oxide of chlorine. X reacts with water, under suitable conditions, to form the two acids HCl and HCl O3 in the m…Question 88: Element Q readily oxidises in air. The oxide produced reacts with water to form a solution of very low pH. Where could element Q be found i…Question 89: Elements D and E are both in Period 3. Element D has the smallest atomic radius in Period 3. There are only two elements in Period 3 which …Question 90: Element W is in period three of the Periodic Table and has a solid, white oxide, X. X is thermally stable and has a very high melting point…Question 91: Which oxide will cause an increase in pH when added to water? A MgO B Al 2O3 C SiO2 D SO218 / 40
Question 92: Silicon forms a tetrachloride, SiCl 4. Which statements are correct? 1 In SiCl 4, the Si is δ+ and each Cl is δ–. 2 SiCl 4 is a liquid at r…Question 93: Which oxide will cause an increase in pH when added to water? A MgO B Al 2O3 C SiO2 D SO2Question 94: X and Y are oxides of different Period 3 elements. If one mole of X is added to water, the solution formed is neutralised by exactly one mo…Question 95: Sodium, magnesium and aluminium are three elements in Period 3 of the Periodic Table. Each element forms an oxide. Which row is correct? so…Question 96: Which statements are correct? 1 Aluminium chloride dissolves in water to give an acidic solution. 2 Magnesium chloride dissolves in water t…19 / 40
Question 97: Element Z has a giant structure. The chloride of Z reacts with water to give a solution with a pH less than 5. Which pair shows two element…Question 98: Sodium, aluminium and silicon are three elements in Period 3. Each element forms an oxide. Which row has three correct properties of these …Question 99: What is the order of increasing melting point of the three chlorides shown? CCl 4 MgCl 2 PCl 5 lowest highest melting poi…Question 100: One molecule of an oxide of element Z reacts with six molecules of water to produce an acidic compound. What is element Z? A aluminium B ph…Question 101: Which element, when burned in oxygen, can form an oxide that is a reducing agent? A Na B Mg C Al D S20 / 40
Question 102: Element X is in Period 3. It reacts rapidly with water to form an alkaline solution. Which statement about the chloride of element X is cor…Question 103: When added to water, which oxides will not cause a change in pH? 1 Al 2O3 2 SiO2 3 P4O10Question 104: X and Y are two elements in Period 3 of the Periodic Table. They combine to form compound Z. X forms a soluble acidic oxide. The oxidation …Question 105: Three test-tubes, X, Y and Z, each contain water. ● A small amount of NaCl is added to test-tube X. ● A small amount of SiCl 4 is added to …Question 106: Element X, in Period 3, has the following properties. ● Its oxide has a giant structure. ● It forms covalent bonds with chlorine. ● Its oxi…21 / 40
Question 107: Compound X is the oxide of a Period 3 element. Compound X reacts with water to give an acidic solution. A solution is prepared by reacting …Question 108: X and Y are two elements in Period 3 of the Periodic Table. They combine to form compound Z. X forms a soluble acidic oxide. The oxidation …Question 109: Three test-tubes, X, Y and Z, each contain water. ● A small amount of NaCl is added to test-tube X. ● A small amount of SiCl 4 is added to …Question 110: Which observations are made when a sample of silicon chloride, SiCl 4, is added to a beaker of water? A No visible change is observed. B St…Question 111: A sample containing x mol of Al 2Cl 6 is dissolved in water to give solution W. In order to precipitate all of the aluminium as its hydroxi…22 / 40
Question 112: Element X is in Period 3. Element X forms a solid oxide Y. Y reacts with hot concentrated hydrochloric acid. Y reacts with hot aqueous sodi…Question 113: R is an oxide of Period 3 element T. 5.00 g of R contains 2.50 g of T. What is T? A magnesium B aluminium C silicon D sulfurQuestion 114: A sample of SiCl 4 is added to cold water. Which statement describes the mixture formed at the end of the reaction? A acidic solution with …Question 115: L and M are elements in Period 3 of the Periodic Table. ● The oxide of L is a solid at room temperature. This oxide has a giant structure. …Question 116: Which oxides will cause a change in pH when added to water? 1 CaO 2 Al 2O3 3 SiO2Question 117: Two oxides of Period 3 elements are added separately to water. Both react to form colourless solutions. One solution is alkaline, the other…23 / 40
Question 118: Which element requires the least number of moles of oxygen for the complete combustion of 1 mol of its atoms? A aluminium B magnesium C pho…Question 119: An element, Y, reacts according to the following sequence. burns an excess of in O2 HCl (aq) NaOH(aq) NaOH(aq) Y white solid solution white…Question 120: Which elements form a chloride in which both covalent bonding and coordinate (dative covalent) bonding are present? 1 Al 2 Si 3 MgQuestion 121: A mixture of two Period 3 oxides are added to water. A solution forms with a pH of just below 7. What could be the constituents of the mixt…Question 122: Which element requires the least number of moles of oxygen for the complete combustion of 1 mol of its atoms? A aluminium B magnesium C pho…Question 123: An element, Y, reacts according to the following sequence. burns an excess of in O2 HCl (aq) NaOH(aq) NaOH(aq) Y white solid solution white…24 / 40
Question 124: Which elements form a chloride in which both covalent bonding and coordinate (dative covalent) bonding are present? 1 Al 2 Si 3 MgQuestion 125: Which statement about aluminium chloride is correct? A Aluminium chloride has a much higher melting point than magnesium chloride due to th…Question 126: Which statement for the element in Period 3 and Group 13 of the Periodic Table is correct? A It has the highest melting point of the elemen…Question 127: A student reacts 0.100 mol of each of sodium, magnesium and phosphorus atoms separately with an excess of oxygen. Which rows are correct? m…Question 128: Silicon is heated in an excess of chlorine, producing compound J. An excess of water is added to the sample of J produced. Which row is cor…25 / 40
Question 129: NH3(aq) is added to separate samples of NaCl (aq), MgCl 2(aq), BaCl 2(aq) and SiCl 4(l). Under the conditions of this experiment, only two …Question 130: Solid R is added to a solution of ammonium nitrate and the mixture is heated. A gas is given off which turns red litmus to blue. What could…Question 131: Which row is correct? element with the greater element with an fifth ionisation energy amphoteric oxide A aluminium aluminium only B alumin…Question 132: Each of the chlorides listed is added to water. 1 aluminium chloride 2 magnesium chloride 3 silicon tetrachloride 4 phosphorus pentachlorid…26 / 40
Question 133: Separate 1.0 g samples of Na2O, MgO, Al 2O3, SiO2, NaCl, MgCl 2, Al 2Cl 6 and SiCl 4 are added to separate beakers containing water and sti…Question 134: Why is the first ionisation energy of phosphorus greater than the first ionisation energy of silicon? A A phosphorus atom has one more prot…Question 135: Element X requires strong heating to react with oxygen. Element X reacts with chlorine to give a covalently-bonded chloride. What could be …Question 136: T is an element in Period 3. The first ionisation energy of T is lower than that of the element with one less proton. The oxide of T does n…27 / 40
Question 137: The electrical conductivities of two compounds, Y and Z, are shown. for Y for Z conductivity of the compound good does not in the liquid st…Question 138: Separate 1.0 g samples of Na2O, MgO, Al 2O3, SiO2, NaCl, MgCl 2, Al 2Cl 6 and SiCl 4 are added to separate beakers containing water and sti…Question 139: Two Period 3 elements, X and Y, burn separately in oxygen to form solid oxides. The oxide of X is insoluble in water. The oxide of Y dissol…28 / 40
Question 140: Which row describes the structure and bonding of SiO2 and SiCl 4? SiO2 SiCl 4 structure bonding structure bonding A giant covalent giant co…Question 141: The elements magnesium and phosphorus are reacted separately with an excess of oxygen to form their oxides. Each oxide is then added separa…Question 142: X, Y and Z are elements all found within Groups 13, 14 and 15 of the Periodic Table. X is in the same group in the Periodic Table as Y. Y a…29 / 40
Question 143: Bromocresol green is an acid-base indicator. Below a pH of 3.8 it is yellow. Above a pH of 5.4 it is blue. Between these values it is green…Question 144: Which mixture results in a solution with the highest pH? A 1.0g of aluminium oxide and 1.0g of aluminium chloride B 1.0g of magnesium oxide…Question 145: What happens when a piece of magnesium ribbon is placed in cold water? A A vigorous effervescence occurs. B Bubbles of gas form slowly on t…30 / 40
Question 146: X, Y and Z are elements all found within Groups 13, 14 and 15 of the Periodic Table. X is in the same group in the Periodic Table as Y. Y a…Question 147: Bromocresol green is an acid-base indicator. Below a pH of 3.8 it is yellow. Above a pH of 5.4 it is blue. Between these values it is green…31 / 40
Question 148: The relative magnitude of the property X of five elements is shown. P, Q, R, S and T are all in Period 3 and have consecutive atomic number…Question 149: Element X is in Period 3. Element X reacts with oxygen to produce a solid, Y. When solid Y is added to water, a solution with a pH of less …Question 150: Z is a compound of two elements, X and Y. Element X shows a very large increase between its 5th and 6th ionisation energies. It has the sec…32 / 40
Question 151: Elements Y and Z are both in Period 3 of the Periodic Table. When the chloride of element Y is added to water, it reacts and a solution of …Question 152: Aluminium, silicon and phosphorus are elements in Period 3 of the Periodic Table. Each element forms an oxide. Which row is correct? Al 2O3…Question 153: Which statement is correct? A Aluminium chloride has a giant ionic lattice of Al 3+ and Cl – ions. B Sodium chloride dissolves in water, fo…Question 154: Sodium is added to water to form solution Y. The pH of solution Y is measured. When powdered substance X is added to solution Y, the pH fal…Question 155: Which statement is correct? A Adding sodium oxide to water gives a lower pH solution than adding silicon oxide to water. B The oxidation st…33 / 40
Question 156: Magnesium, aluminium and silicon are elements in the Periodic Table. Each element forms an oxide. Which row is correct? MgO Al 2O3 SiO2 A b…Question 157: Which statement correctly describes what happens when silicon tetrachloride is added to water? A The SiCl 4 dissolves to give a neutral sol…Question 158: X and Y are two elements from Period 3 of the Periodic Table. Element X has a higher electrical conductivity than element Y. Element Y has …Question 159: What are the acid–base nature and structure of SO2? acid–base nature structure A acidic giant covalent lattice B acidic simple molecular C …34 / 40
Question 160: Elements X and Y are in Period 3 of the Periodic Table. Element X is either phosphorus or sulfur. Element Y is either sodium or magnesium. …Question 161: Q is a semi-conductor. The chloride of Q reacts with water to form white fumes and an acidic solution. Which Period 3 element is Q? A magne…Question 162: Which oxide is insoluble in aqueous sodium hydroxide? A MgO B Al 2O3 C P4O10 D SO2Question 163: Sodium and sulfur are burned separately in oxygen. Each reaction has a distinctive coloured flame. Which row is correct? Na + O2 S + O2…Question 164: What are the acid–base nature and structure of SO2? acid–base nature structure A acidic giant covalent lattice B acidic simple molecular C …35 / 40
Question 165: Elements X and Y are in Period 3 of the Periodic Table. Element X is either phosphorus or sulfur. Element Y is either sodium or magnesium. …Question 166: Q is a semi-conductor. The chloride of Q reacts with water to form white fumes and an acidic solution. Which Period 3 element is Q? A magne…Question 167: Q, R and S are consecutive elements in Period 3 of the Periodic Table. Element R has the highest first ionisation energy and the lowest mel…36 / 40
Question 168: J is either MgCl 2 or Al Cl 3. K is either SiO2 or SiCl 4. add drops of aqueous white add an excess of aqueous precipitate J(aq) sodium hyd…Question 169: Compound X contains two Period 3 elements, Y and Z. Compound X reacts with water to form only two products: a slightly soluble hydroxide an…Question 170: The oxide and chloride of an element X are separately mixed with water. The two resulting solutions have the same effect on litmus. What co…Question 171: Elements Y and Z are both in Period 3. Element Y has the smallest atomic radius in Period 3. There are only two elements in Period 3 that h…37 / 40
Question 172: Three statements about the chemical periodicity of Period 3 oxides are listed. 1 The maximum oxidation state of the Period 3 elements in th…Question 173: X, Y and Z are elements in Period 3 of the Periodic Table. The results of some experiments carried out with compounds of these elements are…Question 174: What increases for each successive element in Period 3 from sodium to sulfur? A the highest oxidation number of the element seen in an oxid…38 / 40
Question 175: The atomic radii and ionic radii for three elements in Period 3 are shown. atomic radius/nm ionic radius/nm element X 0.118 0.053 element Y…Question 176: Three equations are listed. x, y and z are all whole numbers. 1 xAl + yO2zAl2O3 2 xMg + yO2zMgO 3 xNa + yO2zNa2O Which equations c…Question 177: Compound X is an oxide of a Period 3 element. Compound X is a white solid at 25 °C. It reacts with water to form an acidic solution. What i…Question 178: Element E is in Period 3. It forms a chloride which reacts with a small amount of water to produce a white precipitate and steamy fumes. Th…39 / 40
Question 179: Three equations are listed. x, y and z are all whole numbers. 1 xAl + yO2zAl2O3 2 xMg + yO2zMgO 3 xNa + yO2zNa2O Which equations c…Question 180: Which oxide has a simple structure rather than a giant structure? A MgO B Al2O3 C SiO2 D P4O1040 / 40

Mark scheme180 answers

Answers below. Sit the paper first if you are practising.

Pastlit

Chemistry 9701 · Periodicity of chemical properties of the elements in Period 3 — Paper 1

A Level · topical answer key — answer key (teacher use)

Question

Answer

Marks

1D1
2D1
3D1
4A1
5D1
6C1
7D1
8D1
9A1
10D1
11A1
12A1
13D1
14C1
15D1
16B1
17A1
18B1
19B1
20D1
21B1
22A1
23A1
24A1
25A1
26A1
27D1
28C1
29B1
30B1
31C1
32B1
33B1
34D1
35A1
36C1
37C1
38A1
39D1
40A1
41D1
42D1
43C1
44D1
45A1
46D1
47B1
48D1
49D1
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Pastlit

Chemistry 9701 · Periodicity of chemical properties of the elements in Period 3 — Paper 1

A Level · topical answer key — answer key (teacher use)

Question

Answer

Marks

50B1
51D1
52D1
53C1
54A1
55B1
56B1
57C1
58—1
59D1
60D1
61A1
62D1
63C1
64C1
65B1
66C1
67A1
68B1
69A1
70A1
71B1
72D1
73D1
74C1
75D1
76C1
77C1
78B1
79D1
80C1
81C1
82B1
83A1
84B1
85D1
86D1
87C1
88D1
89D1
90C1
91A1
92A1
93A1
94D1
95D1
96B1
97B1
98D1
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Pastlit

Chemistry 9701 · Periodicity of chemical properties of the elements in Period 3 — Paper 1

A Level · topical answer key — answer key (teacher use)

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Answer

Marks

99A1
100B1
101D1
102A1
103B1
104B1
105A1
106B1
107D1
108B1
109A1
110B1
111D1
112B1
113D1
114B1
115C1
116D1
117C1
118D1
119C1
120D1
121C1
122D1
123C1
124D1
125C1
126C1
127A1
128D1
129B1
130C1
131A1
132C1
133D1
134A1
135D1
136A1
137C1
138D1
139A1
140B1
141A1
142A1
143A1
144B1
145B1
146A1
147A1
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Pastlit

Chemistry 9701 · Periodicity of chemical properties of the elements in Period 3 — Paper 1

A Level · topical answer key — answer key (teacher use)

Question

Answer

Marks

148A1
149C1
150C1
151D1
152C1
153D1
154A1
155C1
156D1
157C1
158B1
159B1
160D1
161C1
162A1
163C1
164B1
165D1
166C1
167D1
168A1
169A1
170D1
171D1
172D1
173A1
174A1
175C1
176A1
177D1
178B1
179A1
180D1
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Another paper, or another topic

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All of The Periodic Table: chemical periodicity →

Questions as text

Q1 · One mole of magnesium, aluminium and sulphur are each completely burned in an excess of… 9701/11 Oct/Nov 2005

12 One mole of magnesium, aluminium and sulphur are each completely burned in an excess of oxygen gas. Which graph shows the moles of oxygen used in each case? A B moles of moles of oxygen oxygen used used 0 0 Mg Al S Mg Al S C D moles of moles of oxygen oxygen used used 0 0 Mg Al S Mg Al S

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2005

Q2 · The oxide and chloride of an element X are separately mixed with water 9701/11 May/June 2006

14 The oxide and chloride of an element X are separately mixed with water. The two resulting solutions have the same effect on litmus. What is element X? A sodium B magnesium C aluminium D phosphorus

1 marks

Answer: D

This question in 9701/11 May/June 2006

Q3 · Steam is passed over heated magnesium to give compound X and hydrogen 9701/11 Oct/Nov 2006

13 Steam is passed over heated magnesium to give compound X and hydrogen. What is not a property of compound X? A It has a high melting point. B It is a basic oxide. C It is a white solid. D It is very soluble in water.

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2006

Q4 · In an experiment, 0.1 g samples of Na2O, MgO, P4O10 and SO2 are added to separate 100 cm3… 9701/11 May/June 2008

13 In an experiment, 0.1 g samples of Na2O, MgO, P4O10 and SO2 are added to separate 100 cm3 volumes of water. For which oxide is the resulting mixture most alkaline? A Na2O B MgO C P4O10 D SO2

1 marks

Answer: A

This question in 9701/11 May/June 2008

Q5 · Which oxide, when mixed with water, will produce the most acidic solution? 9701/11 Oct/Nov 2008

13 Which oxide, when mixed with water, will produce the most acidic solution? A CO B CO2 C SiO2 D P2O5

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2008

Q6 · Which statement correctly describes what happens when silicon tetrachloride is added to… 9701/11 Oct/Nov 2009

13 Which statement correctly describes what happens when silicon tetrachloride is added to water? A The SiCl4 dissolves to give a neutral solution only. B The SiCl4 reacts to give an acidic solution only. C The SiCl4 reacts to give a precipitate and an acidic solution. D The SiCl4 reacts to give a precipitate and a neutral solution.

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2009

Q7 · The oxide and chloride of an element X are separately mixed with water 9701/11 Oct/Nov 2009

14 The oxide and chloride of an element X are separately mixed with water. The two resulting solutions have the same effect on litmus. What is element X? A sodium B magnesium C aluminium D phosphorus

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2009

Q8 · Which element of the third period requires the least number of moles of oxygen for the… 9701/11 May/June 2010

18 Which element of the third period requires the least number of moles of oxygen for the complete combustion of 1 mol of the element? A aluminium B magnesium C phosphorus D sodium

1 marks

Answer: D

This question in 9701/11 May/June 2010

Q9 · Two properties of non-metallic elements and their atoms are as follows 9701/11 May/June 2010

19 Two properties of non-metallic elements and their atoms are as follows. property 1 has an oxide that can form a strong acid in water property 2 has no paired 3p electrons Which properties do phosphorus and sulfur have? phosphorus sulfur A 1 and 2 1 only B 1 only 1 and 2 C 1 and 2 1 and 2 D 2 only 1 only

1 marks

Answer: A

This question in 9701/11 May/June 2010

Q10 · Which element of the third period requires the least number of moles of oxygen for the… 9701/12 May/June 2010

16 Which element of the third period requires the least number of moles of oxygen for the complete combustion of 1 mol of the element? A aluminium B magnesium C phosphorus D sodium

1 marks

Answer: D

This question in 9701/12 May/June 2010

Q11 · Two properties of non-metallic elements and their atoms are as follows 9701/12 May/June 2010

17 Two properties of non-metallic elements and their atoms are as follows. property 1 has an oxide that can form a strong acid in water property 2 has no paired 3p electrons Which properties do phosphorus and sulfur have? phosphorus sulfur A 1 and 2 1 only B 1 only 1 and 2 C 1 and 2 1 and 2 D 2 only 1 only

1 marks

Answer: A

This question in 9701/12 May/June 2010

Q12 · Two properties of non-metallic elements and their atoms are as follows 9701/13 May/June 2010

16 Two properties of non-metallic elements and their atoms are as follows. property 1 has an oxide that can form a strong acid in water property 2 has no paired 3p electrons Which properties do phosphorus and sulfur have? phosphorus sulfur A 1 and 2 1 only B 1 only 1 and 2 C 1 and 2 1 and 2 D 2 only 1 only

1 marks

Answer: A

This question in 9701/13 May/June 2010

Q13 · Which element of the third period requires the least number of moles of oxygen for the… 9701/13 May/June 2010

19 Which element of the third period requires the least number of moles of oxygen for the complete combustion of 1 mol of the element? A aluminium B magnesium C phosphorus D sodium

1 marks

Answer: D

This question in 9701/13 May/June 2010

Q14 · Which property of beryllium and its compounds is typical of the elements below it in… 9701/13 Oct/Nov 2010

19 Which property of beryllium and its compounds is typical of the elements below it in Group II? A Be does not react with hot water. B BeCl2 is covalent. C Be(NO3)2 produces BeO on thermal decomposition. D BeO dissolves in alkalis.

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2010

Q15 · Steam is passed over heated magnesium to give compound X and hydrogen 9701/11 May/June 2011

14 Steam is passed over heated magnesium to give compound X and hydrogen. What is not a property of compound X? A It has an Mr of 40.3. B It is basic. C It is a white solid. D It is very soluble in water.

1 marks

Answer: D

This question in 9701/11 May/June 2011

Q16 · Which statements are correct? 9701/11 May/June 2011

34 Which statements are correct? 1 Aluminium chloride dissolves in water to give an acidic solution. 2 Magnesium chloride dissolves in water to give a slightly acidic solution. 3 Sodium chloride dissolves in water to give an alkaline solution.

1 marks

Answer: B

This question in 9701/11 May/June 2011

Q17 · Which oxides react with water to give a solution of pH 10 or higher? 9701/11 May/June 2011

35 Which oxides react with water to give a solution of pH 10 or higher? 1 CaO 2 Na2O 3 SrO

1 marks

Answer: A

This question in 9701/11 May/June 2011

Q18 · The highest oxides of the elements sodium to chlorine are separately added to water 9701/12 May/June 2011

14 The highest oxides of the elements sodium to chlorine are separately added to water. Which diagram best represents the pH of the resulting mixtures? A B pH pH Na2O Al 2O3SiO2 P4O10 SO3 Cl 2O7 Na2O Al 2O3SiO2 P4O10 SO3 Cl 2O7 MgO MgO C D pH pH Na2O Al 2O3SiO2 P4O10 SO3 Cl 2O7 Na2O Al 2O3SiO2 P4O10 SO3 Cl 2O7 MgO MgO

1 marks

Answer: B

This question in 9701/12 May/June 2011

Q19 · Why does aluminium oxide dissolve in sodium hydroxide solution? 9701/12 May/June 2011

16 Why does aluminium oxide dissolve in sodium hydroxide solution? A Aluminium oxide can behave as a base. B Aluminium oxide can behave as an acid. C Aluminium oxide has a giant structure. D The bonding in aluminium oxide is ionic.

1 marks

Answer: B

This question in 9701/12 May/June 2011

Q20 · Steam is passed over heated magnesium to give compound X and hydrogen 9701/13 May/June 2011

14 Steam is passed over heated magnesium to give compound X and hydrogen. What is not a property of compound X? A It has an Mr of 40.3. B It is basic. C It is a white solid. D It is very soluble in water.

1 marks

Answer: D

This question in 9701/13 May/June 2011

Q21 · Which statements are correct? 9701/13 May/June 2011

36 Which statements are correct? 1 Aluminium chloride dissolves in water to give an acidic solution. 2 Magnesium chloride dissolves in water to give a slightly acidic solution. 3 Sodium chloride dissolves in water to give an alkaline solution.

1 marks

Answer: B

This question in 9701/13 May/June 2011

Q22 · Which oxides react with water to give a solution of pH 10 or higher? 9701/13 May/June 2011

38 Which oxides react with water to give a solution of pH 10 or higher? 1 CaO 2 Na2O 3 SrO

1 marks

Answer: A

This question in 9701/13 May/June 2011

Q23 · Which element shows the greatest tendency to form some covalent compounds? 9701/11 Oct/Nov 2011

13 Which element shows the greatest tendency to form some covalent compounds? A aluminium B magnesium C neon D potassium

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2011

Q24 · In a car engine, non-metallic element X forms a pollutant oxide Y 9701/11 Oct/Nov 2011

36 In a car engine, non-metallic element X forms a pollutant oxide Y. Further oxidation of Y to Z occurs spontaneously in the atmosphere. In this further oxidation, 1 mol of Y reacts with 0.5 mol of gaseous oxygen. Which statements about X, Y and Z are correct? 1 X forms a basic hydride. 2 Y is a diatomic molecule. 3 Z is a polar molecule.

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2011

Q25 · Which element shows the greatest tendency to form some covalent compounds? 9701/13 Oct/Nov 2011

13 Which element shows the greatest tendency to form some covalent compounds? A aluminium B magnesium C neon D potassium

1 marks

Answer: A

This question in 9701/13 Oct/Nov 2011

Q26 · The period 4 elements gallium (Ga), germanium (Ge), arsenic (As) and selenium (Se) are… 9701/12 May/June 2012

15 The period 4 elements gallium (Ga), germanium (Ge), arsenic (As) and selenium (Se) are the elements below aluminium, silicon, phosphorus and sulfur in the Periodic Table, a portion of which is shown below. period 3 elements Al Si P S period 4 elements Ga Ge As Se The properties of each period 4 element resemble those of the period 3 element directly above it. Which period 4 elements form oxides that dissolve in water to give an acid solution? A As and Se B Ga and Ge C Ga and Se D Se only

1 marks

Answer: A

This question in 9701/12 May/June 2012

Q27 · Use of the Data Booklet is relevant to this question 9701/11 Oct/Nov 2012

17 Use of the Data Booklet is relevant to this question. 1.15 g of a metallic element reacts with 300 cm3 of oxygen at 298 K and 1 atm pressure, to form an oxide which contains O2– ions. What could be the identity of the metal? A calcium B magnesium C potassium D sodium

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2012

Q28 · Elements X and Y are both in period three 9701/11 Oct/Nov 2012

18 Elements X and Y are both in period three. When the chloride of X is added to water, it reacts and a solution of pH 2 is produced. When the chloride of Y is added to water, it dissolves and a solution of pH 7 is produced. Which statement explains these observations? A Both chlorides hydrolyse in water. B X is phosphorus and Y is aluminium. C X is silicon and Y is sodium. D X is sodium and Y is phosphorus.

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2012

Q29 · Which of these substances have a giant structure? 9701/11 Oct/Nov 2012

33 Which of these substances have a giant structure? 1 silicon(IV) oxide 2 baked clay found in crockery 3 phosphorus(V) oxide

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2012

Q30 · When added to water, which oxides will not cause a change in pH? 9701/11 Oct/Nov 2012

36 When added to water, which oxides will not cause a change in pH? 1 Al 2O3 2 SiO2 3 P4O10

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2012

Q31 · Elements X and Y are both in period three 9701/12 Oct/Nov 2012

18 Elements X and Y are both in period three. When the chloride of X is added to water, it reacts and a solution of pH 2 is produced. When the chloride of Y is added to water, it dissolves and a solution of pH 7 is produced. Which statement explains these observations? A Both chlorides hydrolyse in water. B X is phosphorus and Y is aluminium. C X is silicon and Y is sodium. D X is sodium and Y is phosphorus.

1 marks

Answer: C

This question in 9701/12 Oct/Nov 2012

Q32 · Which of these substances have a giant structure? 9701/12 Oct/Nov 2012

33 Which of these substances have a giant structure? 1 silicon(IV) oxide 2 baked clay found in crockery 3 phosphorus(V) oxide

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2012

Q33 · When added to water, which oxides will not cause a change in pH? 9701/12 Oct/Nov 2012

36 When added to water, which oxides will not cause a change in pH? 1 Al 2O3 2 SiO2 3 P4O10

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2012

Q34 · During steel-making the impurity P4O10 is removed by reacting it with calcium oxide 9701/13 Oct/Nov 2012

9 During steel-making the impurity P4O10 is removed by reacting it with calcium oxide. The only product of this reaction is the salt calcium phosphate, Ca3(PO4)2. In this reaction, how many moles of calcium oxide react with one mole of P4O10? A 1 B 1.5 C 3 D 6

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2012

Q35 · Mohr’s salt is a pale green crystalline solid which is soluble in water 9701/13 Oct/Nov 2012

13 Mohr’s salt is a pale green crystalline solid which is soluble in water. It contains two cations, one of which is Fe2+ and one anion which is SO4 2–. The identity of the second cation was determined by heating solid Mohr’s salt with solid sodium hydroxide and a colourless gas was evolved. The gas readily dissolved in water giving an alkaline solution. A grey-green solid residue was also formed which was insoluble in water. What are the identities of the gas and the solid residue? gas residue A NH3 Fe(OH)2 B NH3 Na2SO4 C SO2 Fe(OH)2 D SO2 Na2SO4

1 marks

Answer: A

This question in 9701/13 Oct/Nov 2012

Q36 · Which oxide, when mixed with water, will produce the solution with the lowest pH? 9701/13 Oct/Nov 2012

18 Which oxide, when mixed with water, will produce the solution with the lowest pH? A CO2 B Na2O C P4O10 D SiO2

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2012

Q37 · Use of the Data Booklet is relevant to this question 9701/13 May/June 2013

32 Use of the Data Booklet is relevant to this question. Which statements are correct when referring to the atoms 23Na and 24Mg? 1 They have the same number of full electron orbitals. 2 They have the same number of neutrons. 3 They are both reducing agents.

1 marks

Answer: C

This question in 9701/13 May/June 2013

Q38 · Element J is a solid 9701/13 May/June 2013

36 Element J is a solid. It occurs as a contaminant of fossil fuels. Its oxide K is formed in car engines. In the atmosphere, K can be further oxidised to L. Which statements about J, K and L are correct? 1 Atoms of J have paired p electrons. 2 The atmospheric oxidation of K to L is a catalysed reaction. 3 With water, L forms a strong acid.

1 marks

Answer: A

This question in 9701/13 May/June 2013

Q39 · Carbon, nitrogen and sulfur are non-metals 9701/13 Oct/Nov 2013

16 Carbon, nitrogen and sulfur are non-metals. Which statement about their oxides, XO2, is correct? (Where X represents carbon, nitrogen or sulfur.) A All of the XO2 molecules are linear. B In XO2, each element has its highest oxidation number. C All XO2 molecules dissolve in water to form dibasic acids. D All XO2 molecules are formed as a result of burning petrol in a car engine.

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2013

Q40 · Which oxide is insoluble in aqueous sodium hydroxide? 9701/13 Oct/Nov 2013

17 Which oxide is insoluble in aqueous sodium hydroxide? A MgO B Al 2O3 C P4O10 D SO2

1 marks

Answer: A

This question in 9701/13 Oct/Nov 2013

Q41 · Use of the Data Booklet is relevant to this question 9701/13 Oct/Nov 2013

19 Use of the Data Booklet is relevant to this question. Elements J and K react together to form compound L. Elements J and K are both in Period 3. Element J has the smallest atomic radius in Period 3. There are only two elements in Period 3 which have a lower melting point than element K. Which compound could be L? A MgCl 2 B MgS C Na2S D PCl 3

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2013

Q42 · Which chlorides of Period 3 elements will form a neutral solution when added to water? 9701/13 Oct/Nov 2013

36 Which chlorides of Period 3 elements will form a neutral solution when added to water? 1 NaCl 2 Al 2Cl 6 3 PCl 5

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2013

Q43 · Which description of the bonding and acid / base nature of aluminium oxide is correct? 9701/11 May/June 2014

16 Which description of the bonding and acid / base nature of aluminium oxide is correct? bonding acid / base nature A covalent amphoteric B covalent basic C ionic amphoteric D ionic basic

1 marks

Answer: C

This question in 9701/11 May/June 2014

Q44 · X and Y are oxides of different Period 3 elements 9701/12 May/June 2014

13 X and Y are oxides of different Period 3 elements. If one mole of Y is added to water, the solution formed is neutralised by exactly one mole of X. What could be the identities of X and Y? X Y A Al 2O3 P4O10 B Al 2O3 SO3 C Na2O P4O10 D Na2O SO3

1 marks

Answer: D

This question in 9701/12 May/June 2014

Q45 · A student investigated the chloride of a Period 3 element 9701/13 May/June 2014

12 A student investigated the chloride of a Period 3 element. This is what he wrote down as his record of what he did and what he saw. The compound was a white crystalline solid. It dissolved easily in water to give a solution of pH 12. When placed in a test-tube and heated in a roaring Bunsen flame, the compound melted after several minutes heating. What can be deduced from this record? A At least one of the recorded observations is incorrect. B The compound was magnesium chloride, MgCl 2. C The compound was phosphorus pentachloride, PCl 5. D The compound was sodium chloride, NaCl.

1 marks

Answer: A

This question in 9701/13 May/June 2014

Q46 · Which properties do compounds of aluminium and silicon have in common? 9701/13 May/June 2014

18 Which properties do compounds of aluminium and silicon have in common? A Aqueous solutions of their chlorides contain aluminium or silicon cations. B Their chlorides have co-ordinate bonding. C Their oxides are amphoteric. D Their oxides are insoluble in water.

1 marks

Answer: D

This question in 9701/13 May/June 2014

Q47 · Element X, in Period 3, has the following properties 9701/11 Oct/Nov 2014

12 Element X, in Period 3, has the following properties. ● Its oxide has a giant structure. ● It forms covalent bonds with chlorine. ● Its oxide will neutralise HCl (aq). What is element X? A Mg B Al C Si D P

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2014

Q48 · Which property is not associated with the element sodium? 9701/11 Oct/Nov 2014

13 Which property is not associated with the element sodium? A It can react with cold water to form hydrogen. B It forms a basic oxide. C It forms a neutral chloride. D It is an oxidising agent.

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2014

Q49 · Which oxide does not react with cold dilute sodium hydroxide to produce a salt? 9701/11 Oct/Nov 2014

19 Which oxide does not react with cold dilute sodium hydroxide to produce a salt? A Al 2O3 B P4O10 C SO2 D SiO2

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2014

Q50 · Element X, in Period 3, has the following properties 9701/12 Oct/Nov 2014

12 Element X, in Period 3, has the following properties. ● Its oxide has a giant structure. ● It forms covalent bonds with chlorine. ● Its oxide will neutralise HCl (aq). What is element X? A Mg B Al C Si D P

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2014

Q51 · Which property is not associated with the element sodium? 9701/12 Oct/Nov 2014

13 Which property is not associated with the element sodium? A It can react with cold water to form hydrogen. B It forms a basic oxide. C It forms a neutral chloride. D It is an oxidising agent.

1 marks

Answer: D

This question in 9701/12 Oct/Nov 2014

Q52 · Which oxide does not react with cold dilute sodium hydroxide to produce a salt? 9701/12 Oct/Nov 2014

19 Which oxide does not react with cold dilute sodium hydroxide to produce a salt? A Al 2O3 B P4O10 C SO2 D SiO2

1 marks

Answer: D

This question in 9701/12 Oct/Nov 2014

Q53 · X, Y and Z are compounds of three elements in Period 3 9701/13 Oct/Nov 2014

14 X, Y and Z are compounds of three elements in Period 3. Their electrical conductivities are shown in the table. X Y Z conductivity of the compound does not does not good in the molten state conduct conduct conductivity of the mixture obtained does not good good by adding the compound to water conduct What could be compounds X, Y and Z? X Y Z A Al 2O3 SiCl 4 NaF B NaF Al 2O3 SiCl 4 C NaF SiCl 4 SiO2 D SiCl 4 Al 2O3 SiO2

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2014

Q54 · An element Y reacts according to the following sequence 9701/13 Oct/Nov 2014

17 An element Y reacts according to the following sequence. burns an excess of in O2 HCl (aq) NaOH(aq) NaOH(aq) Y white solid solution white precipitate solution What could be element Y? A Al B Ca C Mg D P

1 marks

Answer: A

This question in 9701/13 Oct/Nov 2014

Q55 · One molecule of the oxide of element Z reacts with six molecules of water to produce an… 9701/13 Oct/Nov 2014

18 One molecule of the oxide of element Z reacts with six molecules of water to produce an acidic compound. What is element Z? A aluminium B phosphorus C sodium D sulfur

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2014

Q56 · Which observations are made when a sample of silicon chloride, SiCl 4, is added to a… 9701/11 May/June 2015

14 Which observations are made when a sample of silicon chloride, SiCl 4, is added to a beaker of water? A No visible changes are observed. B Steamy fumes and a white precipitate are both observed. C The appearance of a white precipitate is the only observation. D The appearance of steamy fumes is the only observation.

1 marks

Answer: B

This question in 9701/11 May/June 2015

Q57 · When added to water, which oxides will cause a change in the pH of the water? 9701/12 May/June 2015

35 When added to water, which oxides will cause a change in the pH of the water? 1 SiO2 2 CaO 3 SO2

1 marks

Answer: C

This question in 9701/12 May/June 2015

Q58 · Which chloride of a Period 3 element dissolves in water to form a solution with a pH of 7? 9701/12 Oct/Nov 2015

14 Which chloride of a Period 3 element dissolves in water to form a solution with a pH of 7? A aluminium chloride B phosphorus(V) chloride C silicon(IV) chloride D sodium chloride

1 marks

This question in 9701/12 Oct/Nov 2015

Q59 · Consecutive elements X, Y and Z are in Period 3 of the Periodic Table 9701/12 Feb/March 2016

12 Consecutive elements X, Y and Z are in Period 3 of the Periodic Table. Element Y has the highest first ionisation energy and the lowest melting point of these three elements. What are the identities of X, Y and Z? A sodium, magnesium, aluminium B magnesium, aluminium, silicon C aluminium, silicon, phosphorus D silicon, phosphorus, sulfur

1 marks

Answer: D

This question in 9701/12 Feb/March 2016

Q60 · Elements D and E are both in Period 3 9701/11 May/June 2016

13 Elements D and E are both in Period 3. Element D has the smallest atomic radius in Period 3. There are only two elements in Period 3 which have a lower melting point than element E. Elements D and E react together to form compound L. Which compound could be L? A MgCl 2 B MgS C Na2S D PCl 3

1 marks

Answer: D

This question in 9701/11 May/June 2016

Q61 · A little water is added to each of the following compounds and the mixture warmed 9701/11 May/June 2016

34 A little water is added to each of the following compounds and the mixture warmed. For which compounds will an acidic gas be evolved? 1 aluminium chloride 2 silicon tetrachloride 3 phosphorous pentachloride

1 marks

Answer: A

This question in 9701/11 May/June 2016

Q62 · The oxide and chloride of an element X are separately mixed with water 9701/13 May/June 2016

12 The oxide and chloride of an element X are separately mixed with water. The two resulting solutions have the same effect on litmus. What could element X be? A Al B Ca C Na D P

1 marks

Answer: D

This question in 9701/13 May/June 2016

Q63 · Water is added to anhydrous aluminium chloride to make a 0.1 mol dm–3 solution 9701/11 Oct/Nov 2016

35 Water is added to anhydrous aluminium chloride to make a 0.1 mol dm–3 solution. Which observations are correct? 1 The reaction is endothermic. 2 The solution is acidic. 3 The solution contains the ion [Al (H2O)6]3+.

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2016

Q64 · Water is added to anhydrous aluminium chloride to make a 0.1 mol dm–3 solution 9701/13 Oct/Nov 2016

35 Water is added to anhydrous aluminium chloride to make a 0.1 mol dm–3 solution. Which observations are correct? 1 The reaction is endothermic. 2 The solution is acidic. 3 The solution contains the ion [Al (H2O)6]3+.

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2016

Q65 · Which chlorides, when added to water, can produce a solution with a pH of less than 5? 9701/12 May/June 2017

35 Which chlorides, when added to water, can produce a solution with a pH of less than 5? 1 SiCl 4 2 Al Cl 3 3 MgCl 2

1 marks

Answer: B

This question in 9701/12 May/June 2017

Q66 · Magnesium chloride, MgCl 2, and silicon tetrachloride, SiCl 4, are separately added to… 9701/13 May/June 2017

12 Magnesium chloride, MgCl 2, and silicon tetrachloride, SiCl 4, are separately added to water. What are the approximate pH values of the solutions formed? MgCl 2 SiCl 4 A 0–3 0–3 B 0–3 6–7 C 6–7 0–3 D 6–7 6–7

1 marks

Answer: C

This question in 9701/13 May/June 2017

Q67 · An element Y reacts according to the following sequence 9701/11 Oct/Nov 2017

13 An element Y reacts according to the following sequence. burns an excess of in O2 HCl (aq) NaOH(aq) NaOH(aq) Y white solid solution white precipitate solution What could be element Y? A Al B Ca C Mg D P

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2017

Q68 · Element Z has a giant structure 9701/12 Oct/Nov 2017

13 Element Z has a giant structure. The chloride of Z reacts with water to give a solution with a pH less than 5. Which row shows two elements which could be Z? A aluminium, magnesium B aluminium, silicon C phosphorus, magnesium D phosphorus, silicon

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2017

Q69 · An element Y reacts according to the following sequence 9701/13 Oct/Nov 2017

13 An element Y reacts according to the following sequence. burns an excess of in O2 HCl (aq) NaOH(aq) NaOH(aq) Y white solid solution white precipitate solution What could be element Y? A Al B Ca C Mg D P

1 marks

Answer: A

This question in 9701/13 Oct/Nov 2017

Q70 · Which oxide is insoluble in aqueous sodium hydroxide? 9701/12 Feb/March 2018

13 Which oxide is insoluble in aqueous sodium hydroxide? A MgO B Al 2O3 C P4O10 D SO2

1 marks

Answer: A

This question in 9701/12 Feb/March 2018

Q71 · X, Y and Z are three elements in the third period 9701/12 Feb/March 2018

14 X, Y and Z are three elements in the third period. ● X reacts with chlorine to give a liquid product. ● Y reacts with chlorine to give a solid product that dissolves in water to give a solution of pH 7. ● Z reacts with chlorine to give a solid product that dissolves in water to give a solution of pH 6. Which elements are good conductors of electricity? A X and Y B Y and Z C Y only D Z only

1 marks

Answer: B

This question in 9701/12 Feb/March 2018

Q72 · Silicon is heated in an excess of chlorine, producing compound J 9701/11 May/June 2018

12 Silicon is heated in an excess of chlorine, producing compound J. Excess water is added to the sample of J produced. Which row is correct? Is HCl produced structure of J when water is added to J? A giant molecular no B giant molecular yes C simple molecular no D simple molecular yes

1 marks

Answer: D

This question in 9701/11 May/June 2018

Q73 · Which oxide does not react with cold, dilute sodium hydroxide to produce a salt? 9701/12 May/June 2018

12 Which oxide does not react with cold, dilute sodium hydroxide to produce a salt? A Al 2O3 B P4O10 C SO2 D SiO2

1 marks

Answer: D

This question in 9701/12 May/June 2018

Q74 · Which description of the bonding and acid / base nature of aluminium oxide is correct? 9701/13 May/June 2018

12 Which description of the bonding and acid / base nature of aluminium oxide is correct? bonding acid / base nature A simple covalent amphoteric B giant covalent basic only C ionic amphoteric D ionic basic only

1 marks

Answer: C

This question in 9701/13 May/June 2018

Q75 · X and Y are elements of the third period 9701/13 May/June 2018

13 X and Y are elements of the third period. X and Y are individually heated in excess chlorine. Each product is purified and then separately added to water, producing two solutions. Both solutions have a pH of less than 5. What could be X and Y? A Na and P B Mg and Al C Mg and Si D Si and P

1 marks

Answer: D

This question in 9701/13 May/June 2018

Q76 · Sodium and sulfur are burned separately in oxygen 9701/11 Oct/Nov 2018

12 Sodium and sulfur are burned separately in oxygen. Each reaction has a distinctive coloured flame. Which row is correct? Na + O2 S + O2 A white blue B white yellow C yellow blue D yellow yellow

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2018

Q77 · X and Y are elements in Period 3 of the Periodic Table 9701/11 Oct/Nov 2018

13 X and Y are elements in Period 3 of the Periodic Table. ● The oxide of X is a solid at room temperature. This oxide has a giant structure. ● The chloride of X does not react with water. ● Argon is the only element in Period 3 with a lower melting point than Y. What could be the formula of a compound formed between elements X and Y? A Al 2S3 B MgS C NaCl D PCl 5

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2018

Q78 · Which observations are made when a sample of silicon chloride, SiCl 4, is added to a… 9701/12 Oct/Nov 2018

13 Which observations are made when a sample of silicon chloride, SiCl 4, is added to a beaker of water? A No visible change is observed. B Steamy fumes and a precipitate are both observed. C The appearance of a precipitate is the only observation. D The appearance of steamy fumes is the only observation.

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2018

Q79 · A sample containing x mol of Al 2Cl 6 is dissolved in water to give solution W 9701/12 Oct/Nov 2018

35 A sample containing x mol of Al 2Cl 6 is dissolved in water to give solution W. In order to precipitate all of the aluminium as its hydroxide, y mol of sodium hydroxide are required. More of the alkali is added to re-dissolve the precipitate, giving solution Z. Which statements are correct? 1 the initial pH of solution W is below 7 2 y = 3x 3 Z contains x mol of aluminium

1 marks

Answer: D

This question in 9701/12 Oct/Nov 2018

Q80 · Sodium and sulfur are burned separately in oxygen 9701/13 Oct/Nov 2018

12 Sodium and sulfur are burned separately in oxygen. Each reaction has a distinctive coloured flame. Which row is correct? Na + O2 S + O2 A white blue B white yellow C yellow blue D yellow yellow

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2018

Q81 · X and Y are elements in Period 3 of the Periodic Table 9701/13 Oct/Nov 2018

13 X and Y are elements in Period 3 of the Periodic Table. ● The oxide of X is a solid at room temperature. This oxide has a giant structure. ● The chloride of X does not react with water. ● Argon is the only element in Period 3 with a lower melting point than Y. What could be the formula of a compound formed between elements X and Y? A Al 2S3 B MgS C NaCl D PCl 5

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2018

Q82 · Which row describes the structure and bonding of SiO2 and SiCl 4? 9701/13 Oct/Nov 2018

14 Which row describes the structure and bonding of SiO2 and SiCl 4? SiO2 SiCl 4 bonding structure bonding structure A covalent giant covalent giant B covalent giant covalent simple C ionic giant covalent giant D ionic giant covalent simple

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2018

Q83 · X, Y and Z are elements in Period 3 of the Periodic Table 9701/12 Feb/March 2019

12 X, Y and Z are elements in Period 3 of the Periodic Table. The results of some experiments carried out with compounds of these elements are shown. result of adding result of adding result of adding element the oxide of the the chloride of the the oxide of the element to H2O(l) element to H2O(l) element to HCl (aq) X no reaction hydrolyses forms chloride salt Y forms hydroxide dissolves forms chloride salt Z forms acid hydrolyses hydrolyses Which statement could be correct? A X is Al and Y is Mg. B X is Si and Y is Na. C Y is Al and Z is P. D Y is Na and Z is Al .

1 marks

Answer: A

This question in 9701/12 Feb/March 2019

Q84 · A solid Period 3 element, Q, is reacted with oxygen gas 9701/12 Feb/March 2019

13 A solid Period 3 element, Q, is reacted with oxygen gas. Compound R is formed. When R is added to water the pH decreases. What could be the empirical formula of R? A Q2O4 B Q2O5 C Q4O10 D Q5O2

1 marks

Answer: B

This question in 9701/12 Feb/March 2019

Q85 · 1.15 g of a metallic element needs 300 cm3 of oxygen for complete reaction, under room… 9701/11 May/June 2019

12 1.15 g of a metallic element needs 300 cm3 of oxygen for complete reaction, under room conditions, to form an oxide which contains O2– ions. What could be the identity of this metallic element? A calcium B magnesium C potassium D sodium

1 marks

Answer: D

This question in 9701/11 May/June 2019

Q86 · Which oxides, when placed in cold water for one day, will react with the water? 9701/11 May/June 2019

35 Which oxides, when placed in cold water for one day, will react with the water? 1 MgO 2 Al 2O3 3 SiO2

1 marks

Answer: D

This question in 9701/11 May/June 2019

Q87 · X is either chlorine or an oxide of chlorine 9701/12 May/June 2019

9 X is either chlorine or an oxide of chlorine. X reacts with water, under suitable conditions, to form the two acids HCl and HCl O3 in the mole ratio of 1 (HCl ) : 5 (HCl O3). What could be X? A Cl 2 B Cl 2O C Cl O2 D Cl 2O7

1 marks

Answer: C

This question in 9701/12 May/June 2019

Q88 · Element Q readily oxidises in air 9701/12 May/June 2019

12 Element Q readily oxidises in air. The oxide produced reacts with water to form a solution of very low pH. Where could element Q be found in the Periodic Table? period group A 2 1 B 2 14 C 3 14 D 3 15

1 marks

Answer: D

This question in 9701/12 May/June 2019

Q89 · Elements D and E are both in Period 3 9701/12 May/June 2019

14 Elements D and E are both in Period 3. Element D has the smallest atomic radius in Period 3. There are only two elements in Period 3 which have a lower melting point than element E. Elements D and E react together to form compound L. Which compound could be L? A MgCl 2 B MgS C Na2S D PCl 3

1 marks

Answer: D

This question in 9701/12 May/June 2019

Q90 · Element W is in period three of the Periodic Table and has a solid, white oxide, X 9701/13 May/June 2019

4 Element W is in period three of the Periodic Table and has a solid, white oxide, X. X is thermally stable and has a very high melting point. X is slightly soluble in water. Which row describes the structure and bonding of X? structure bonding A giant covalent three dimensional lattice B strong double bonds covalent within small molecules C giant ionic three dimensional lattice D strong ionic bonds ionic within small molecules

1 marks

Answer: C

This question in 9701/13 May/June 2019

Q91 · Which oxide will cause an increase in pH when added to water? 9701/11 Oct/Nov 2019

12 Which oxide will cause an increase in pH when added to water? A MgO B Al 2O3 C SiO2 D SO2

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2019

Q92 · Silicon forms a tetrachloride, SiCl 4 9701/12 Oct/Nov 2019

35 Silicon forms a tetrachloride, SiCl 4. Which statements are correct? 1 In SiCl 4, the Si is δ+ and each Cl is δ–. 2 SiCl 4 is a liquid at room temperature. 3 SiCl 4 reacts with water to give an acidic solution and a precipitate.

1 marks

Answer: A

This question in 9701/12 Oct/Nov 2019

Q93 · Which oxide will cause an increase in pH when added to water? 9701/13 Oct/Nov 2019

12 Which oxide will cause an increase in pH when added to water? A MgO B Al 2O3 C SiO2 D SO2

1 marks

Answer: A

This question in 9701/13 Oct/Nov 2019

Q94 · X and Y are oxides of different Period 3 elements 9701/12 Feb/March 2020

12 X and Y are oxides of different Period 3 elements. If one mole of X is added to water, the solution formed is neutralised by exactly one mole of Y. What could be the identities of X and Y? X Y A P4O10 Al 2O3 B SO3 Al 2O3 C P4O10 Na2O D SO3 Na2O

1 marks

Answer: D

This question in 9701/12 Feb/March 2020

Q95 · Sodium, magnesium and aluminium are three elements in Period 3 of the Periodic Table 9701/12 Feb/March 2020

16 Sodium, magnesium and aluminium are three elements in Period 3 of the Periodic Table. Each element forms an oxide. Which row is correct? sodium oxide magnesium oxide aluminium oxide A basic amphoteric amphoteric B giant ionic giant ionic simple molecular C high melting point high melting point low melting point D readily reacts with water slight reaction with water no reaction with water

1 marks

Answer: D

This question in 9701/12 Feb/March 2020

Q96 · Which statements are correct? 9701/12 Feb/March 2020

36 Which statements are correct? 1 Aluminium chloride dissolves in water to give an acidic solution. 2 Magnesium chloride dissolves in water to give a solution of pH close to 7. 3 Sodium chloride dissolves in water to give an alkaline solution.

1 marks

Answer: B

This question in 9701/12 Feb/March 2020

Q97 · Element Z has a giant structure 9701/11 May/June 2020

15 Element Z has a giant structure. The chloride of Z reacts with water to give a solution with a pH less than 5. Which pair shows two elements which could be Z? A aluminium, magnesium B aluminium, silicon C phosphorus, magnesium D phosphorus, silicon

1 marks

Answer: B

This question in 9701/11 May/June 2020

Q98 · Sodium, aluminium and silicon are three elements in Period 3 9701/11 May/June 2020

16 Sodium, aluminium and silicon are three elements in Period 3. Each element forms an oxide. Which row has three correct properties of these oxides? sodium oxide aluminium oxide silicon dioxide A basic basic amphoteric B giant ionic giant ionic simple molecular C high melting point low melting point high melting point D reacts with water no reaction with water no reaction with water

1 marks

Answer: D

This question in 9701/11 May/June 2020

Q99 · What is the order of increasing melting point of the three chlorides shown? 9701/11 May/June 2020

19 What is the order of increasing melting point of the three chlorides shown? CCl 4 MgCl 2 PCl 5 lowest highest melting point melting point A CCl 4 PCl 5 MgCl 2 B MgCl 2 CCl 4 PCl 5 C MgCl 2 PCl 5 CCl 4 D PCl 5 CCl 4 MgCl 2

1 marks

Answer: A

This question in 9701/11 May/June 2020

Q100 · One molecule of an oxide of element Z reacts with six molecules of water to produce an… 9701/12 May/June 2020

16 One molecule of an oxide of element Z reacts with six molecules of water to produce an acidic compound. What is element Z? A aluminium B phosphorus C silicon D sulfur

1 marks

Answer: B

This question in 9701/12 May/June 2020

Q101 · Which element, when burned in oxygen, can form an oxide that is a reducing agent? 9701/13 May/June 2020

15 Which element, when burned in oxygen, can form an oxide that is a reducing agent? A Na B Mg C Al D S

1 marks

Answer: D

This question in 9701/13 May/June 2020

Q102 · Element X is in Period 3 9701/13 May/June 2020

19 Element X is in Period 3. It reacts rapidly with water to form an alkaline solution. Which statement about the chloride of element X is correct? A It conducts electricity when molten. B It has a melting point of less than 100 °C. C It has covalent bonding. D It reacts rapidly with cold water.

1 marks

Answer: A

This question in 9701/13 May/June 2020

Q103 · When added to water, which oxides will not cause a change in pH? 9701/13 May/June 2020

36 When added to water, which oxides will not cause a change in pH? 1 Al 2O3 2 SiO2 3 P4O10

1 marks

Answer: B

This question in 9701/13 May/June 2020

Q104 · X and Y are two elements in Period 3 of the Periodic Table 9701/11 Oct/Nov 2020

12 X and Y are two elements in Period 3 of the Periodic Table. They combine to form compound Z. X forms a soluble acidic oxide. The oxidation number of X in this oxide is +4. Y forms an amphoteric oxide. What is the formula of compound Z? A Al P B Al 2S3 C Si2P5 D SiS2

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2020

Q105 · Three test-tubes, X, Y and Z, each contain water 9701/11 Oct/Nov 2020

36 Three test-tubes, X, Y and Z, each contain water. ● A small amount of NaCl is added to test-tube X. ● A small amount of SiCl 4 is added to test-tube Y. ● A small amount of Al Cl 3 is added to test-tube Z. After a short time, two drops of universal indicator solution are added to each test-tube. Which statements can be correct? 1 The pH in test-tube X is 7. 2 The pH in test-tube Y is 2. 3 The pH in test-tube Z is 2.

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2020

Q106 · Element X, in Period 3, has the following properties 9701/12 Oct/Nov 2020

12 Element X, in Period 3, has the following properties. ● Its oxide has a giant structure. ● It forms covalent bonds with chlorine. ● Its oxide will neutralise HCl (aq). What is element X? A Mg B Al C Si D P

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2020

Q107 · Compound X is the oxide of a Period 3 element 9701/12 Oct/Nov 2020

19 Compound X is the oxide of a Period 3 element. Compound X reacts with water to give an acidic solution. A solution is prepared by reacting 0.100 g of compound X with an excess of water. This solution is neutralised by exactly 25.0 cm3 of 0.100 mol dm–3 sodium hydroxide solution. What could be the identity of compound X? A Al 2O3 B MgO C P4O10 D SO3

1 marks

Answer: D

This question in 9701/12 Oct/Nov 2020

Q108 · X and Y are two elements in Period 3 of the Periodic Table 9701/13 Oct/Nov 2020

12 X and Y are two elements in Period 3 of the Periodic Table. They combine to form compound Z. X forms a soluble acidic oxide. The oxidation number of X in this oxide is +4. Y forms an amphoteric oxide. What is the formula of compound Z? A Al P B Al 2S3 C Si2P5 D SiS2

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2020

Q109 · Three test-tubes, X, Y and Z, each contain water 9701/13 Oct/Nov 2020

36 Three test-tubes, X, Y and Z, each contain water. ● A small amount of NaCl is added to test-tube X. ● A small amount of SiCl 4 is added to test-tube Y. ● A small amount of Al Cl 3 is added to test-tube Z. After a short time, two drops of universal indicator solution are added to each test-tube. Which statements can be correct? 1 The pH in test-tube X is 7. 2 The pH in test-tube Y is 2. 3 The pH in test-tube Z is 2.

1 marks

Answer: A

This question in 9701/13 Oct/Nov 2020

Q110 · Which observations are made when a sample of silicon chloride, SiCl 4, is added to a… 9701/12 Feb/March 2021

12 Which observations are made when a sample of silicon chloride, SiCl 4, is added to a beaker of water? A No visible change is observed. B Steamy fumes and a precipitate are both observed. C The appearance of a precipitate is the only observation. D The appearance of steamy fumes is the only observation.

1 marks

Answer: B

This question in 9701/12 Feb/March 2021

Q111 · A sample containing x mol of Al 2Cl 6 is dissolved in water to give solution W 9701/12 Feb/March 2021

35 A sample containing x mol of Al 2Cl 6 is dissolved in water to give solution W. In order to precipitate all of the aluminium as its hydroxide, y mol of sodium hydroxide are required. More of the alkali is added to re-dissolve the precipitate, giving solution Z. Which statements are correct? 1 the initial pH of solution W is below 7 2 y = 3x 3 Z contains x mol of aluminium

1 marks

Answer: D

This question in 9701/12 Feb/March 2021

Q112 · Element X is in Period 3 9701/11 May/June 2021

12 Element X is in Period 3. Element X forms a solid oxide Y. Y reacts with hot concentrated hydrochloric acid. Y reacts with hot aqueous sodium hydroxide to form a compound in which X is part of an anion. How many p electrons does one atom of X have in its outer shell? A 0 B 1 C 2 D 3

1 marks

Answer: B

This question in 9701/11 May/June 2021

Q113 · R is an oxide of Period 3 element T 9701/11 May/June 2021

19 R is an oxide of Period 3 element T. 5.00 g of R contains 2.50 g of T. What is T? A magnesium B aluminium C silicon D sulfur

1 marks

Answer: D

This question in 9701/11 May/June 2021

Q114 · A sample of SiCl 4 is added to cold water 9701/12 May/June 2021

12 A sample of SiCl 4 is added to cold water. Which statement describes the mixture formed at the end of the reaction? A acidic solution with no precipitate B acidic solution with white precipitate C neutral solution with no precipitate D neutral solution with white precipitate

1 marks

Answer: B

This question in 9701/12 May/June 2021

Q115 · L and M are elements in Period 3 of the Periodic Table 9701/12 May/June 2021

13 L and M are elements in Period 3 of the Periodic Table. ● The oxide of L is a solid at room temperature. This oxide has a giant structure. ● The chloride of L does not react with water. ● Argon is the only element in Period 3 with a lower melting point than M. Which formula represents a compound of elements L and M? A Al 2S3 B MgS C NaCl D PCl 5

1 marks

Answer: C

This question in 9701/12 May/June 2021

Q116 · Which oxides will cause a change in pH when added to water? 9701/12 May/June 2021

35 Which oxides will cause a change in pH when added to water? 1 CaO 2 Al 2O3 3 SiO2

1 marks

Answer: D

This question in 9701/12 May/June 2021

Q117 · Two oxides of Period 3 elements are added separately to water 9701/13 May/June 2021

19 Two oxides of Period 3 elements are added separately to water. Both react to form colourless solutions. One solution is alkaline, the other is acidic. What could be the two oxides? A Al 2O3 and SiO2 B Al 2O3 and P4O10 C Na2O and P4O10 D Na2O and SiO2

1 marks

Answer: C

This question in 9701/13 May/June 2021

Q118 · Which element requires the least number of moles of oxygen for the complete combustion of… 9701/11 Oct/Nov 2021

12 Which element requires the least number of moles of oxygen for the complete combustion of 1 mol of its atoms? A aluminium B magnesium C phosphorus D sodium

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2021

Q119 · An element, Y, reacts according to the following sequence 9701/11 Oct/Nov 2021

13 An element, Y, reacts according to the following sequence. burns an excess of in O2 HCl (aq) NaOH(aq) NaOH(aq) Y white solid solution white precipitate solution What could be element Y? A Na B Mg C Al D P

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2021

Q120 · Which elements form a chloride in which both covalent bonding and coordinate (dative… 9701/11 Oct/Nov 2021

35 Which elements form a chloride in which both covalent bonding and coordinate (dative covalent) bonding are present? 1 Al 2 Si 3 Mg

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2021

Q121 · A mixture of two Period 3 oxides are added to water 9701/12 Oct/Nov 2021

12 A mixture of two Period 3 oxides are added to water. A solution forms with a pH of just below 7. What could be the constituents of the mixture? A Al 2O3 and MgO B Na2O and MgO C Na2O and P4O10 D SO3 and P4O10

1 marks

Answer: C

This question in 9701/12 Oct/Nov 2021

Q122 · Which element requires the least number of moles of oxygen for the complete combustion of… 9701/13 Oct/Nov 2021

12 Which element requires the least number of moles of oxygen for the complete combustion of 1 mol of its atoms? A aluminium B magnesium C phosphorus D sodium

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2021

Q123 · An element, Y, reacts according to the following sequence 9701/13 Oct/Nov 2021

13 An element, Y, reacts according to the following sequence. burns an excess of in O2 HCl (aq) NaOH(aq) NaOH(aq) Y white solid solution white precipitate solution What could be element Y? A Na B Mg C Al D P

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2021

Q124 · Which elements form a chloride in which both covalent bonding and coordinate (dative… 9701/13 Oct/Nov 2021

35 Which elements form a chloride in which both covalent bonding and coordinate (dative covalent) bonding are present? 1 Al 2 Si 3 Mg

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2021

Q125 · Which statement about aluminium chloride is correct? 9701/11 May/June 2022

6 Which statement about aluminium chloride is correct? A Aluminium chloride has a much higher melting point than magnesium chloride due to the small size of the aluminium ion. B Anhydrous aluminium chloride reacts vigorously with water to form a solution with a pH greater than 7. C Each Al 2Cl 6 molecule found in aluminium chloride vapour contains two coordinate bonds. D The bonding between aluminium and chlorine is strongly ionic due to the large difference in electronegativity.

1 marks

Answer: C

This question in 9701/11 May/June 2022

Q126 · Which statement for the element in Period 3 and Group 13 of the Periodic Table is correct? 9701/11 May/June 2022

18 Which statement for the element in Period 3 and Group 13 of the Periodic Table is correct? A It has the highest melting point of the elements in its period. B It has exactly one electron in its shell with principal quantum number 3. C It forms an oxide that reacts with aqueous sodium hydroxide. D It forms a chloride that dissolves in water to give a neutral solution.

1 marks

Answer: C

This question in 9701/11 May/June 2022

Q127 · A student reacts 0.100 mol of each of sodium, magnesium and phosphorus atoms separately… 9701/11 May/June 2022

19 A student reacts 0.100 mol of each of sodium, magnesium and phosphorus atoms separately with an excess of oxygen. Which rows are correct? mass of oxide oxide formed / g 1 sodium 3.10 2 magnesium 4.03 3 phosphorus 7.10 A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

1 marks

Answer: A

This question in 9701/11 May/June 2022

Q128 · Silicon is heated in an excess of chlorine, producing compound J 9701/11 May/June 2022

23 Silicon is heated in an excess of chlorine, producing compound J. An excess of water is added to the sample of J produced. Which row is correct? Is HCl produced structure of J when water is added to J? A giant molecular no B giant molecular yes C simple molecular no D simple molecular yes

1 marks

Answer: D

This question in 9701/11 May/June 2022

Q129 · NH3(aq) is added to separate samples of NaCl (aq), MgCl 2(aq), BaCl 2(aq) and SiCl 4(l) 9701/12 May/June 2022

17 NH3(aq) is added to separate samples of NaCl (aq), MgCl 2(aq), BaCl 2(aq) and SiCl 4(l). Under the conditions of this experiment, only two samples will produce a white precipitate when NH3(aq) is added. What are these two samples? A MgCl 2(aq) and BaCl 2(aq) B MgCl 2(aq) and SiCl 4(l) C NaCl (aq) and BaCl 2(aq) D NaCl (aq) and SiCl 4(l)

1 marks

Answer: B

This question in 9701/12 May/June 2022

Q130 · Solid R is added to a solution of ammonium nitrate and the mixture is heated 9701/12 May/June 2022

25 Solid R is added to a solution of ammonium nitrate and the mixture is heated. A gas is given off which turns red litmus to blue. What could be R? A aluminium chloride B magnesium chloride C sodium oxide D phosphorus oxide

1 marks

Answer: C

This question in 9701/12 May/June 2022

Q131 · Which row is correct? 9701/13 May/June 2022

18 Which row is correct? element with the greater element with an fifth ionisation energy amphoteric oxide A aluminium aluminium only B aluminium both aluminium and phosphorus C phosphorus aluminium only D phosphorus both aluminium and phosphorus

1 marks

Answer: A

This question in 9701/13 May/June 2022

Q132 · Each of the chlorides listed is added to water 9701/13 May/June 2022

19 Each of the chlorides listed is added to water. 1 aluminium chloride 2 magnesium chloride 3 silicon tetrachloride 4 phosphorus pentachloride Which chlorides form an aqueous solution that reacts with sodium carbonate to produce carbon dioxide? A 1 and 2 only B 3 and 4 only C 1, 3 and 4 only D 1, 2, 3 and 4

1 marks

Answer: C

This question in 9701/13 May/June 2022

Q133 · Separate 1.0 g samples of Na2O, MgO, Al 2O3, SiO2, NaCl, MgCl 2, Al 2Cl 6 and SiCl 4 are… 9701/11 Oct/Nov 2022

25 Separate 1.0 g samples of Na2O, MgO, Al 2O3, SiO2, NaCl, MgCl 2, Al 2Cl 6 and SiCl 4 are added to separate beakers containing water and stirred. The number of beakers containing a white solid is Q. An excess of NaOH(aq) is then added to each beaker and stirred. The number of beakers now containing a white solid is R. Which row is correct? Q R A 3 2 B 3 3 C 4 3 D 4 4

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2022

Q134 · Why is the first ionisation energy of phosphorus greater than the first ionisation energy… 9701/12 Oct/Nov 2022

1 Why is the first ionisation energy of phosphorus greater than the first ionisation energy of silicon? A A phosphorus atom has one more proton in its nucleus. B The atomic radius of a phosphorus atom is greater. C The outer electron in a phosphorus atom is more shielded. D The outer electron in a phosphorus atom is paired.

1 marks

Answer: A

This question in 9701/12 Oct/Nov 2022

Q135 · Element X requires strong heating to react with oxygen 9701/12 Oct/Nov 2022

17 Element X requires strong heating to react with oxygen. Element X reacts with chlorine to give a covalently-bonded chloride. What could be the identity of element X? A magnesium B phosphorus C sodium D silicon

1 marks

Answer: D

This question in 9701/12 Oct/Nov 2022

Q136 · T is an element in Period 3 9701/12 Oct/Nov 2022

25 T is an element in Period 3. The first ionisation energy of T is lower than that of the element with one less proton. The oxide of T does not react with water. What is the identity of T? A aluminium B silicon C sodium D sulfur

1 marks

Answer: A

This question in 9701/12 Oct/Nov 2022

Q137 · The electrical conductivities of two compounds, Y and Z, are shown 9701/13 Oct/Nov 2022

17 The electrical conductivities of two compounds, Y and Z, are shown. for Y for Z conductivity of the compound good does not in the liquid state conduct conductivity of the mixture obtained good good by adding the compound to water What are compounds Y and Z? Y Z A Al 2O3 SiCl 4 B NaCl Al 2O3 C NaCl SiCl 4 D SiCl 4 Al 2O3

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2022

Q138 · Separate 1.0 g samples of Na2O, MgO, Al 2O3, SiO2, NaCl, MgCl 2, Al 2Cl 6 and SiCl 4 are… 9701/13 Oct/Nov 2022

25 Separate 1.0 g samples of Na2O, MgO, Al 2O3, SiO2, NaCl, MgCl 2, Al 2Cl 6 and SiCl 4 are added to separate beakers containing water and stirred. The number of beakers containing a white solid is Q. An excess of NaOH(aq) is then added to each beaker and stirred. The number of beakers now containing a white solid is R. Which row is correct? Q R A 3 2 B 3 3 C 4 3 D 4 4

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2022

Q139 · Two Period 3 elements, X and Y, burn separately in oxygen to form solid oxides 9701/12 Feb/March 2023

19 Two Period 3 elements, X and Y, burn separately in oxygen to form solid oxides. The oxide of X is insoluble in water. The oxide of Y dissolves in water to form a solution which dissolves the oxide of X. What could X and Y be? X Y A aluminium sodium B magnesium sodium C silicon phosphorus D silicon sulfur

1 marks

Answer: A

This question in 9701/12 Feb/March 2023

Q140 · Which row describes the structure and bonding of SiO2 and SiCl 4? 9701/12 Feb/March 2023

20 Which row describes the structure and bonding of SiO2 and SiCl 4? SiO2 SiCl 4 structure bonding structure bonding A giant covalent giant covalent B giant covalent simple covalent C giant ionic giant covalent D giant ionic simple covalent

1 marks

Answer: B

This question in 9701/12 Feb/March 2023

Q141 · The elements magnesium and phosphorus are reacted separately with an excess of oxygen to… 9701/13 May/June 2023

22 The elements magnesium and phosphorus are reacted separately with an excess of oxygen to form their oxides. Each oxide is then added separately to water and the pH values of the resulting solutions are measured. The same two elements are reacted separately with an excess of chlorine to form their chlorides. Each chloride is then added separately to water and the pH values of the resulting solutions are measured. Which row is correct? oxide giving chloride giving the higher pH the higher pH A magnesium magnesium B magnesium phosphorus C phosphorus magnesium D phosphorus phosphorus

1 marks

Answer: A

This question in 9701/13 May/June 2023

Q142 · X, Y and Z are elements all found within Groups 13, 14 and 15 of the Periodic Table 9701/11 Oct/Nov 2023

16 X, Y and Z are elements all found within Groups 13, 14 and 15 of the Periodic Table. X is in the same group in the Periodic Table as Y. Y and Z are in Period 3. The first ionisation energy of X is greater than the first ionisation energy of Y. The melting point of Z is less than the melting point of Y. Y and Z both form chlorides which are white solids. These white solids react with water to produce solutions with a pH of less than 4. Which row of the table shows the possible identities of X and Y? X Y A B Al B Ge Si C As P D N P

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2023

Q143 · Bromocresol green is an acid-base indicator 9701/11 Oct/Nov 2023

18 Bromocresol green is an acid-base indicator. Below a pH of 3.8 it is yellow. Above a pH of 5.4 it is blue. Between these values it is green. Bromocresol green is added to the aqueous solution formed when the chloride of element T is added to water. The colour becomes yellow. When an excess of the solid oxide of element U is slowly added to this yellow solution, the indicator turns green then blue. Which row could identify element T and element U? element T element U A silicon sodium B silicon phosphorus C magnesium sodium D magnesium phosphorus

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2023

Q144 · Which mixture results in a solution with the highest pH? 9701/12 Oct/Nov 2023

20 Which mixture results in a solution with the highest pH? A 1.0g of aluminium oxide and 1.0g of aluminium chloride B 1.0g of magnesium oxide and 1.0g of magnesium chloride C 1.0g of phosphorus oxide and 1.0g of phosphorus chloride D 1.0g of silicon dioxide and 1.0g of silicon chloride

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2023

Q145 · What happens when a piece of magnesium ribbon is placed in cold water? 9701/12 Oct/Nov 2023

21 What happens when a piece of magnesium ribbon is placed in cold water? A A vigorous effervescence occurs. B Bubbles of gas form slowly on the magnesium. C The magnesium floats on the surface of the water and reacts quickly. D The magnesium glows and a white solid is produced.

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2023

Q146 · X, Y and Z are elements all found within Groups 13, 14 and 15 of the Periodic Table 9701/13 Oct/Nov 2023

16 X, Y and Z are elements all found within Groups 13, 14 and 15 of the Periodic Table. X is in the same group in the Periodic Table as Y. Y and Z are in Period 3. The first ionisation energy of X is greater than the first ionisation energy of Y. The melting point of Z is less than the melting point of Y. Y and Z both form chlorides which are white solids. These white solids react with water to produce solutions with a pH of less than 4. Which row of the table shows the possible identities of X and Y? X Y A B Al B Ge Si C As P D N P

1 marks

Answer: A

This question in 9701/13 Oct/Nov 2023

Q147 · Bromocresol green is an acid-base indicator 9701/13 Oct/Nov 2023

18 Bromocresol green is an acid-base indicator. Below a pH of 3.8 it is yellow. Above a pH of 5.4 it is blue. Between these values it is green. Bromocresol green is added to the aqueous solution formed when the chloride of element T is added to water. The colour becomes yellow. When an excess of the solid oxide of element U is slowly added to this yellow solution, the indicator turns green then blue. Which row could identify element T and element U? element T element U A silicon sodium B silicon phosphorus C magnesium sodium D magnesium phosphorus

1 marks

Answer: A

This question in 9701/13 Oct/Nov 2023

Q148 · The relative magnitude of the property X of five elements is shown 9701/12 Feb/March 2024

16 The relative magnitude of the property X of five elements is shown. P, Q, R, S and T are all in Period 3 and have consecutive atomic numbers. The letters are not the actual chemical symbols of the elements. R Q P X S T atomic number Which row is correct for property X and element R? property X element R A electrical conductivity Al B electronegativity Si C melting point Al D second ionisation energy Si

1 marks

Answer: A

This question in 9701/12 Feb/March 2024

Q149 · Element X is in Period 3 9701/12 Feb/March 2024

17 Element X is in Period 3. Element X reacts with oxygen to produce a solid, Y. When solid Y is added to water, a solution with a pH of less than 7 is produced. What is the identity of element X? A sodium B silicon C phosphorus D sulfur

1 marks

Answer: C

This question in 9701/12 Feb/March 2024

Q150 · Z is a compound of two elements, X and Y 9701/11 May/June 2024

3 Z is a compound of two elements, X and Y. Element X shows a very large increase between its 5th and 6th ionisation energies. It has the second largest 1st ionisation energy in its group. Element Y shows a very large increase between its 6th and 7th ionisation energies. It has the largest 1st ionisation energy in its group. What is compound Z? A NO2 B PCl 5 C P4O10 D SF6

1 marks

Answer: C

This question in 9701/11 May/June 2024

Q151 · Elements Y and Z are both in Period 3 of the Periodic Table 9701/11 May/June 2024

16 Elements Y and Z are both in Period 3 of the Periodic Table. When the chloride of element Y is added to water, it reacts and a solution of pH 2 is produced. When the chloride of element Z is added to water, it dissolves and a solution of pH 7 is produced. Which statement explains these observations? A Both chlorides hydrolyse in water. B Element Y is magnesium and element Z is sodium. C Element Y is phosphorus and element Z is aluminium. D Element Y is silicon and element Z is sodium.

1 marks

Answer: D

This question in 9701/11 May/June 2024

Q152 · Aluminium, silicon and phosphorus are elements in Period 3 of the Periodic Table 9701/11 May/June 2024

17 Aluminium, silicon and phosphorus are elements in Period 3 of the Periodic Table. Each element forms an oxide. Which row is correct? Al 2O3 SiO2 P4O10 A basic amphoteric acidic B giant ionic giant ionic simple molecular C high melting point high melting point low melting point D vigorous reaction with water slight reaction with water vigorous reaction with water

1 marks

Answer: C

This question in 9701/11 May/June 2024

Q153 · Which statement is correct? 9701/12 May/June 2024

16 Which statement is correct? A Aluminium chloride has a giant ionic lattice of Al 3+ and Cl – ions. B Sodium chloride dissolves in water, forming hydrogen chloride and sodium hydroxide. C The strong covalent bonds in silicon chloride prevent it from reacting with water. D When phosphorus(V) chloride is added to water, the resulting solution conducts electricity.

1 marks

Answer: D

This question in 9701/12 May/June 2024

Q154 · Sodium is added to water to form solution Y 9701/12 May/June 2024

20 Sodium is added to water to form solution Y. The pH of solution Y is measured. When powdered substance X is added to solution Y, the pH falls. Which two compounds could each be substance X? A MgCl 2 and Al (OH)3 B MgCl 2 and K2O C NaCl and Al (OH)3 D NaCl and K2O

1 marks

Answer: A

This question in 9701/12 May/June 2024

Q155 · Which statement is correct? 9701/12 May/June 2024

25 Which statement is correct? A Adding sodium oxide to water gives a lower pH solution than adding silicon oxide to water. B The oxidation state of sodium in its chloride is higher than the oxidation state of silicon in its chloride. C The atomic radius of sodium is larger than that of silicon. D The melting point of the chloride of sodium is lower than the melting point of the chloride of silicon.

1 marks

Answer: C

This question in 9701/12 May/June 2024

Q156 · Magnesium, aluminium and silicon are elements in the Periodic Table 9701/13 May/June 2024

16 Magnesium, aluminium and silicon are elements in the Periodic Table. Each element forms an oxide. Which row is correct? MgO Al 2O3 SiO2 A basic amphoteric amphoteric B giant ionic simple molecular giant ionic C high melting point high melting point low melting point D slight reaction with water no reaction with water no reaction with water

1 marks

Answer: D

This question in 9701/13 May/June 2024

Q157 · Which statement correctly describes what happens when silicon tetrachloride is added to… 9701/13 May/June 2024

17 Which statement correctly describes what happens when silicon tetrachloride is added to water? A The SiCl 4 dissolves to give a neutral solution only. B The SiCl 4 reacts to give an acidic solution only. C The SiCl 4 reacts to give a precipitate and an acidic solution. D The SiCl 4 reacts to give a precipitate and a neutral solution.

1 marks

Answer: C

This question in 9701/13 May/June 2024

Q158 · X and Y are two elements from Period 3 of the Periodic Table 9701/13 May/June 2024

18 X and Y are two elements from Period 3 of the Periodic Table. Element X has a higher electrical conductivity than element Y. Element Y has a higher melting point than element X. Which formula is a compound formed from element X and element Y? A MgS B Mg2Si C NaCl D SiCl 4

1 marks

Answer: B

This question in 9701/13 May/June 2024

Q159 · What are the acid–base nature and structure of SO2? 9701/11 Oct/Nov 2024

16 What are the acid–base nature and structure of SO2? acid–base nature structure A acidic giant covalent lattice B acidic simple molecular C basic giant covalent lattice D basic simple molecular

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2024

Q160 · Elements X and Y are in Period 3 of the Periodic Table 9701/11 Oct/Nov 2024

17 Elements X and Y are in Period 3 of the Periodic Table. Element X is either phosphorus or sulfur. Element Y is either sodium or magnesium. Element X forms an oxide that reacts with water to give a solution containing the aqueous anion XO4 2–. One mole of element Y reacts with one mole of chlorine molecules. At the end of the reaction, all of the element Y and all of the chlorine molecules have been used up. What are elements X and Y? X Y A phosphorus sodium B phosphorus magnesium C sulfur sodium D sulfur magnesium

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2024

Q161 · Q is a semi-conductor 9701/11 Oct/Nov 2024

18 Q is a semi-conductor. The chloride of Q reacts with water to form white fumes and an acidic solution. Which Period 3 element is Q? A magnesium B aluminium C silicon D phosphorus

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2024

Q162 · Which oxide is insoluble in aqueous sodium hydroxide? 9701/12 Oct/Nov 2024

17 Which oxide is insoluble in aqueous sodium hydroxide? A MgO B Al 2O3 C P4O10 D SO2

1 marks

Answer: A

This question in 9701/12 Oct/Nov 2024

Q163 · Sodium and sulfur are burned separately in oxygen 9701/12 Oct/Nov 2024

18 Sodium and sulfur are burned separately in oxygen. Each reaction has a distinctive coloured flame. Which row is correct? Na + O2 S + O2 A white flame blue flame B white flame yellow flame C yellow flame blue flame D yellow flame yellow flame

1 marks

Answer: C

This question in 9701/12 Oct/Nov 2024

Q164 · What are the acid–base nature and structure of SO2? 9701/13 Oct/Nov 2024

16 What are the acid–base nature and structure of SO2? acid–base nature structure A acidic giant covalent lattice B acidic simple molecular C basic giant covalent lattice D basic simple molecular

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2024

Q165 · Elements X and Y are in Period 3 of the Periodic Table 9701/13 Oct/Nov 2024

17 Elements X and Y are in Period 3 of the Periodic Table. Element X is either phosphorus or sulfur. Element Y is either sodium or magnesium. Element X forms an oxide that reacts with water to give a solution containing the aqueous anion XO4 2–. One mole of element Y reacts with one mole of chlorine molecules. At the end of the reaction, all of the element Y and all of the chlorine molecules have been used up. What are elements X and Y? X Y A phosphorus sodium B phosphorus magnesium C sulfur sodium D sulfur magnesium

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2024

Q166 · Q is a semi-conductor 9701/13 Oct/Nov 2024

18 Q is a semi-conductor. The chloride of Q reacts with water to form white fumes and an acidic solution. Which Period 3 element is Q? A magnesium B aluminium C silicon D phosphorus

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2024

Q167 · Q, R and S are consecutive elements in Period 3 of the Periodic Table 9701/12 Feb/March 2025

17 Q, R and S are consecutive elements in Period 3 of the Periodic Table. Element R has the highest first ionisation energy and the lowest melting point of these three elements. What are the identities of Q, R and S? Q R S A Na Mg Al B Mg Al Si C Al Si P D Si P S

1 marks

Answer: D

This question in 9701/12 Feb/March 2025

Q168 · J is either MgCl 2 or Al Cl 3 9701/12 Feb/March 2025

20 J is either MgCl 2 or Al Cl 3. K is either SiO2 or SiCl 4. add drops of aqueous white add an excess of aqueous precipitate J(aq) sodium hydroxide precipitate sodium hydroxide dissolves add water misty white fumes and a K white precipitate in a solution with pH less than 7 Which row is correct? identity of J identity of K A Al Cl 3 SiCl 4 B Al Cl 3 SiO2 C MgCl 2 SiCl 4 D MgCl 2 SiO2

1 marks

Answer: A

This question in 9701/12 Feb/March 2025

Q169 · Compound X contains two Period 3 elements, Y and Z 9701/11 May/June 2025

24 Compound X contains two Period 3 elements, Y and Z. Compound X reacts with water to form only two products: a slightly soluble hydroxide and compound Q. Q is a compound of element Z and hydrogen. Compound Q burns in moist air to produce an oxide and water. The oxidation number of element Z in the oxide is +5. Which row identifies element Y and element Z? element Y element Z A Mg P B Na S C Na P D Mg S

1 marks

Answer: A

This question in 9701/11 May/June 2025

Q170 · The oxide and chloride of an element X are separately mixed with water 9701/12 May/June 2025

16 The oxide and chloride of an element X are separately mixed with water. The two resulting solutions have the same effect on litmus. What could element X be? A Al B Ca C Na D P

1 marks

Answer: D

This question in 9701/12 May/June 2025

Q171 · Elements Y and Z are both in Period 3 9701/12 May/June 2025

22 Elements Y and Z are both in Period 3. Element Y has the smallest atomic radius in Period 3. There are only two elements in Period 3 that have a lower melting point than element Z. Elements Y and Z react together to form compound R. Which compound could be R? A MgCl 2 B MgS C Na2S D PCl 3

1 marks

Answer: D

This question in 9701/12 May/June 2025

Q172 · Three statements about the chemical periodicity of Period 3 oxides are listed 9701/13 May/June 2025

20 Three statements about the chemical periodicity of Period 3 oxides are listed. 1 The maximum oxidation state of the Period 3 elements in their oxides increases from sodium to phosphorus, then decreases from phosphorus to sulfur. 2 The oxides from sodium to aluminium dissolve in water without hydrolysis; from silicon to sulfur they are hydrolysed by water. 3 The structure and bonding changes from giant ionic to giant covalent to simple molecular. Which statements are correct? A 1, 2 and 3 B 1 only C 2 and 3 only D 3 only

1 marks

Answer: D

This question in 9701/13 May/June 2025

Q173 · X, Y and Z are elements in Period 3 of the Periodic Table 9701/14 May/June 2025

21 X, Y and Z are elements in Period 3 of the Periodic Table. The results of some experiments carried out with compounds of these elements are shown. result of adding result of adding result of adding element the oxide of the the chloride of the the oxide of the element to H2O(l) element to H2O(l) element to HCl (aq) X no reaction hydrolyses forms chloride salt Y forms hydroxide dissolves forms chloride salt Z forms acid hydrolyses hydrolyses Which statement is correct? A Element X is Al and element Y is Mg. B Element X is Si and element Y is Na. C Element Y is Al and element Z is P. D Element Y is Na and element Z is Al .

1 marks

Answer: A

This question in 9701/14 May/June 2025

Q174 · What increases for each successive element in Period 3 from sodium to sulfur? 9701/14 May/June 2025

24 What increases for each successive element in Period 3 from sodium to sulfur? A the highest oxidation number of the element seen in an oxide B the melting point of the elements C the number of occupied orbitals in the atom D the pH of the solutions of the chlorides in water

1 marks

Answer: A

This question in 9701/14 May/June 2025

Q175 · The atomic radii and ionic radii for three elements in Period 3 are shown 9701/11 Oct/Nov 2025

16 The atomic radii and ionic radii for three elements in Period 3 are shown. atomic radius/nm ionic radius/nm element X 0.118 0.053 element Y 0.099 0.180 element Z 0.160 0.072 Using this data, which statement is correct? A Element X has lower electrical conductivity than element Y. B Element Y has a higher melting point than element X. C Element Y and element Z react to form an ionic compound. D Element Z forms ionic compounds by gaining electrons.

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2025

Q176 · Three equations are listed 9701/11 Oct/Nov 2025

17 Three equations are listed. x, y and z are all whole numbers. 1 xAl + yO2zAl2O3 2 xMg + yO2zMgO 3 xNa + yO2zNa2O Which equations can be balanced if x = 4 and z = 2? A 1 and 3 B 1 only C 2 only D 3 only

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2025

Q177 · Compound X is an oxide of a Period 3 element 9701/12 Oct/Nov 2025

18 Compound X is an oxide of a Period 3 element. Compound X is a white solid at 25 °C. It reacts with water to form an acidic solution. What is compound X? A aluminium oxide B silicon dioxide C sulfur dioxide D phosphorus(V) oxide

1 marks

Answer: D

This question in 9701/12 Oct/Nov 2025

Q178 · Element E is in Period 3 9701/12 Oct/Nov 2025

23 Element E is in Period 3. It forms a chloride which reacts with a small amount of water to produce a white precipitate and steamy fumes. This precipitate is soluble in NaOH(aq) and in HCl (aq). What is element E? A magnesium B aluminium C silicon D phosphorus

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2025

Q179 · Three equations are listed 9701/13 Oct/Nov 2025

17 Three equations are listed. x, y and z are all whole numbers. 1 xAl + yO2zAl2O3 2 xMg + yO2zMgO 3 xNa + yO2zNa2O Which equations can be balanced if x = 4 and z = 2? A 1 and 3 B 1 only C 2 only D 3 only

1 marks

Answer: A

This question in 9701/13 Oct/Nov 2025

Q180 · Which oxide has a simple structure rather than a giant structure? 9701/13 Oct/Nov 2025

18 Which oxide has a simple structure rather than a giant structure? A MgO B Al2O3 C SiO2 D P4O10

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2025