Cambridge IGCSE Chemistry (9-1) 0971 — 2020 May/June Paper 1 · Variant 2

Question 1

1 Each rectangle shows the arrangement of particles in each of the three states of matter. X, Y and Z represent the processes needed to change from one state to another. X Y Z What are the processes X, Y and Z? X Y Z A evaporating subliming condensing B evaporating subliming freezing C subliming evaporating condensing D subliming evaporating freezing

Accepted Answer

D

Question 2

2 Which piece of apparatus is used to measure 25.0 cm3 of aqueous sodium hydroxide? A B C D

Accepted Answer

D

Question 3

3 Which process is used to produce drinking water from sea water? A crystallisation B distillation C filtration D chlorination

Accepted Answer

B

Question 4

4 The diagram shows the electronic structure of a particle with a nucleon number (mass number) of 40. e e e e e e e e e e e 40 e e e e e e e The table shows the suggestions that three students, 1, 2 and 3, made to identify the particle. student 1 2 3 particle Ar Cl Ca2+ Which students are correct? A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

Accepted Answer

B

Question 5

5 The Group I element sodium forms an ionic bond with the Group VII element fluorine. Which two ions are produced? A Na+ and F+ B Na+ and F– C Na– and F– D Na– and F+

Accepted Answer

B

Question 6

6 The electronic structures of two atoms, P and Q, are shown. P Q P and Q combine together to form a compound. What is the type of bonding in the compound and what is the formula of the compound? type of bonding formula A ionic PQ B ionic PQ2 C covalent PQ2 D covalent PQ

Accepted Answer

A

Question 7

7 Graphite is a macromolecule. Which statements about graphite are correct? 1 Carbon atoms form four covalent bonds with neighbouring atoms. 2 There are free electrons between layers of carbon atoms. 3 Graphite is a useful lubricant. 4 Graphite is a good conductor of electricity. A 1 and 2 B 1, 3 and 4 C 2, 3 and 4 D 3 and 4 only

Accepted Answer

C

Question 8

8 Aluminium oxide has the formula Al 2O3. Which statement about aluminium oxide is correct? A 2 g of aluminium atoms are combined with 3 g of oxygen atoms. B 2 g of aluminium atoms are combined with 3 g of oxygen molecules. C Aluminium oxide has a relative formula mass of 102. D Pure aluminium oxide contains a higher mass of oxygen than of aluminium.

Accepted Answer

C

Question 9

9 Dilute sulfuric acid is electrolysed using carbon electrodes. Which row shows the products formed at each electrode? anode cathode A hydrogen oxygen B hydrogen sulfur C oxygen hydrogen D oxygen sulfur

Accepted Answer

C

Question 10

10 Which fuel does not rely on combustion to release energy? A gasoline B hydrogen C methane D uranium

Accepted Answer

D

Question 11

11 The energy level diagram shows the energy of the reactants and products in a chemical reaction. reactants energy products progress of reaction Which row correctly describes the energy change and the type of reaction shown? description of type of reaction energy change A energy is given out endothermic to the surroundings B energy is given out exothermic to the surroundings C energy is taken in from endothermic the surroundings D energy is taken in from exothermic the surroundings

Accepted Answer

B

Question 12

12 Which list contains only chemical changes? A melting, evaporating, dissolving B rusting, freezing, subliming C neutralisation, polymerisation, combustion D boiling, condensing, distillation

Accepted Answer

C

Question 13

13 Which row shows the changes that all increase the rate of a chemical reaction? concentration temperature particle size of reactants A decrease decrease decrease B decrease increase increase C increase decrease increase D increase increase decrease

Accepted Answer

D

Question 14

14 Which reaction is reversible? A an iron nail rusting when left in moist air B limestone reacting with an acid to form carbon dioxide gas C magnesium burning in air to produce a white ash D white anhydrous copper(II) sulfate turning blue when water is added

Accepted Answer

D

Question 15

15 When heated strongly, silicon(IV) oxide reacts with carbon. SiO2  +  2C  →  Si  +  2CO Which term describes what happens to silicon(IV) oxide? A thermal decomposition B neutralisation C oxidation D reduction

Accepted Answer

D

Question 16

16 The graph shows how the pH of a solution changes as an acid is added to an alkali. acid  +  alkali  →  salt  +  water Which letter represents the area of the graph where both acid and salt are present? A 14 B C pH 7 D 0 volume of acid added

Accepted Answer

D

Question 17

17 Element G is a metal in Group I of the Periodic Table and element H is a non-metal in Group VII. Both of these elements form oxides. Which statement about their oxides is correct? A Both oxides are acidic. B Both oxides are basic. C The oxide of G is acidic and the oxide of H is basic. D The oxide of H is acidic and the oxide of G is basic.

Accepted Answer

D

Question 18

18 The apparatus shown is used to prepare aqueous copper(II) sulfate. filter paper stirrer excess of solid X solid X Y aqueous copper(II) sulfate heat What are X and Y? X Y A copper aqueous iron(II) sulfate B copper(II) chloride dilute sulfuric acid C copper(II) oxide dilute sulfuric acid D sulfur aqueous copper(II) chloride

Accepted Answer

C

Question 19

19 An aqueous solution of a compound M is tested. The results are shown. ● It gave a lilac colour in a flame test. ● It produced a white precipitate when tested with acidified barium nitrate. What is M? A copper(II) chloride B copper(II) sulfate C potassium carbonate D potassium sulfate

Accepted Answer

D

Question 20

20 The character of the elements and charges on the ions of the elements change across the Periodic Table. Which row describes the elements on the left of the table and the elements on the right? elements on the left elements on the right character charge on ion character charge on ion A metallic positive non-metallic negative B metallic negative non-metallic positive C non-metallic positive metallic negative D non-metallic negative metallic positive

Accepted Answer

A

Question 21

21 Which statement about Group I and Group VII elements is correct? A Group VII elements are monoatomic non-metals. B Lithium is more reactive with water than caesium. C The melting points of Group I metals increase down the group. D Potassium bromide reacts with chlorine to produce an orange solution.

Accepted Answer

D

Question 22

22 The properties of the element titanium, Ti, can be predicted from its position in the Periodic Table.

Which row identifies the properties of titanium?

forms coloured
compounds

can be used conducts electricity
as a catalyst when solid

has low density

v v x

v v v
v x v
x v v

Accepted Answer

B

Question 23

23 Which diagram shows a mixture of noble gases? A B C D

Accepted Answer

A

Question 24

24 Which property is shown by all metals? A They are extracted from their ores by heating with carbon. B They conduct electricity. C They form acidic oxides. D They react with hydrochloric acid to form hydrogen.

Accepted Answer

B

Question 25

25 The reactions of four metals, W, X, Y and Z, are shown. metal observations W reacts with steam and hydrochloric acid but not cold water X reacts with hydrochloric acid but not with steam or cold water Y reacts with hydrochloric acid and cold water Z does not react with hydrochloric acid What is the order of reactivity for metals W, X, Y and Z? most least reactive reactive A Y W X Z B Y X W Z C Z W X Y D Z X W Y

Accepted Answer

A

Question 26

26 Molten iron from the blast furnace contains impurities. The process of turning the impure iron into steel involves blowing oxygen into the molten iron and adding calcium oxide. What are the reasons for blowing in oxygen and adding calcium oxide? blowing in oxygen adding calcium oxide A carbon is removed by reacting with oxygen reacts with acidic impurities making slag B carbon is removed by reacting with oxygen reacts with slag and so removes it C iron reacts with the oxygen reacts with acidic impurities making slag D iron reacts with the oxygen reacts with slag and so removes it

Accepted Answer

A

Question 27

27 Which statement about mild steel explains why it is a good choice for car bodies? A It is cheap and strong. B It is a good conductor. C It is low density. D It resists rusting.

Accepted Answer

A

Question 28

28 Which statement about pure water is not correct? A It condenses at 100 °C. B It freezes at 0 °C. C It turns cobalt(II) chloride paper blue. D It turns anhydrous copper(II) sulfate blue.

Accepted Answer

C

Question 29

29 Which compounds both contribute to ‘acid rain’? A carbon monoxide and lead compounds B carbon monoxide and oxides of nitrogen C oxides of nitrogen and sulfur dioxide D sulfur dioxide and lead compounds

Accepted Answer

C

Question 30

30 The diagrams show experiments to investigate rusting of iron nails. 1 2 3 layer of oil tap salt boiled water water water In which test-tubes do the nails rust? A 1 only B 1 and 2 only C 1 and 3 only D 1, 2 and 3

Accepted Answer

B

Question 31

31 Which bag is not suitable for use as a fertiliser? A B C D ammonium potassium sodium sodium nitrate sulfate chloride phosphate NH4NO3 K2SO4 NaCl Na3PO4

Accepted Answer

C

Question 32

32 X is a colourless greenhouse gas. It is a waste product from digestion in animals. It is generally unreactive, but it can be burnt. What is X? A carbon dioxide B methane C nitrogen D sulfur dioxide

Accepted Answer

B

Question 33

33 The list shows four methods that were suggested for the formation of carbon dioxide. 1 cracking methane using steam 2 action of heat on a carbonate 3 complete combustion of methane 4 reaction of a carbonate with oxygen Which methods would result in the production of carbon dioxide? A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

Accepted Answer

C

Question 34

34 A student suggests three uses of calcium carbonate (limestone). 1 manufacture of cement 2 manufacture of iron 3 treating alkaline soils Which suggestions are correct? A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

Accepted Answer

A

Question 35

35 Which list shows the fractions obtained from distilling petroleum, in order of increasing boiling point? A bitumen → diesel oil → fuel oil → lubricating oil B diesel oil → gasoline → naphtha → kerosene C gasoline → naphtha → kerosene → diesel oil D kerosene → lubricating oil → naphtha → refinery gas

Accepted Answer

C

Question 36

36 The structures of four compounds are shown. 1 2 3 4 H H H H H H H H H H C C H C C H C C O H H C C C H H H H H H H H H H Which compounds are members of the same homologous series? A 1 and 2 only B 1 and 4 C 1, 2 and 3 D 2 and 4

Accepted Answer

B

Question 37

37 Increasing the number of atoms in one molecule of a hydrocarbon increases the amount of energy released when it burns. What is the correct order? less energy more energy released released A ethene ethane methane B ethene methane ethane C methane ethane ethene D methane ethene ethane

Accepted Answer

D

Question 38

38 Which statement about alcohols is correct? A Alcohols and carboxylic acids have the same functional group. B Ethanoic acid is produced from the reduction of ethanol. C Ethanol is produced in an addition reaction between ethene and hydrogen. D Water is produced from the combustion of alcohols.

Accepted Answer

D

Question 39

39 An organic compound, P, reacts with zinc to produce a gas, Q. What are P and Q? P Q A ethanoic acid carbon dioxide B ethanoic acid hydrogen C ethanol carbon dioxide D ethanol hydrogen

Accepted Answer

B

Question 40

40 Which substances are natural polymers? 1 proteins 2 carbohydrates 3 nylon 4 poly(ethene) A 1 and 2 B 1 and 3 C 2 and 3 D 3 and 4

Accepted Answer

A

Question paper16 pages

Mark scheme3 pages

Questions as text

Q1 · Each rectangle shows the arrangement of particles in each of the three states of matter

Q2 · Which piece of apparatus is used to measure 25.0 cm3 of aqueous sodium hydroxide?

Q3 · Which process is used to produce drinking water from sea water?

Q4 · The diagram shows the electronic structure of a particle with a nucleon number (mass…

Q5 · The Group I element sodium forms an ionic bond with the Group VII element fluorine

Q6 · The electronic structures of two atoms, P and Q, are shown

Q7 · Graphite is a macromolecule

Q8 · Aluminium oxide has the formula Al 2O3

Q9 · Dilute sulfuric acid is electrolysed using carbon electrodes

Q10 · Which fuel does not rely on combustion to release energy?

Q11 · The energy level diagram shows the energy of the reactants and products in a chemical…

Q12 · Which list contains only chemical changes?

Q13 · Which row shows the changes that all increase the rate of a chemical reaction?

Q14 · Which reaction is reversible?

Q15 · When heated strongly, silicon(IV) oxide reacts with carbon

Q16 · The graph shows how the pH of a solution changes as an acid is added to an alkali

Q17 · Element G is a metal in Group I of the Periodic Table and element H is a non-metal in…

Q18 · The apparatus shown is used to prepare aqueous copper(II) sulfate

Q19 · An aqueous solution of a compound M is tested

Q20 · The character of the elements and charges on the ions of the elements change across the…

Q21 · Which statement about Group I and Group VII elements is correct?

Q22 · The properties of the element titanium, Ti, can be predicted from its position in the…

Q23 · Which diagram shows a mixture of noble gases?

Q24 · Which property is shown by all metals?

Q25 · The reactions of four metals, W, X, Y and Z, are shown

Q26 · Molten iron from the blast furnace contains impurities

Q27 · Which statement about mild steel explains why it is a good choice for car bodies?

Q28 · Which statement about pure water is not correct?

Q29 · Which compounds both contribute to ‘acid rain’?

Q30 · The diagrams show experiments to investigate rusting of iron nails

Q31 · Which bag is not suitable for use as a fertiliser?

Q32 · X is a colourless greenhouse gas

Q33 · The list shows four methods that were suggested for the formation of carbon dioxide

Q34 · A student suggests three uses of calcium carbonate (limestone)

Q35 · Which list shows the fractions obtained from distilling petroleum, in order of increasing…

Q36 · The structures of four compounds are shown

Q37 · Increasing the number of atoms in one molecule of a hydrocarbon increases the amount of…

Q38 · Which statement about alcohols is correct?

Q39 · An organic compound, P, reacts with zinc to produce a gas, Q

Q40 · Which substances are natural polymers?

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