Questions as text
Q1 · Dilute sulphuric acid is added to antacid tablets in the apparatus shown 0654/11 May/June 2005
20 Dilute sulphuric acid is added to antacid tablets in the apparatus shown. dilute sulphuric acid limewater antacid tablets The limewater turns milky. What do the antacid tablets contain? A magnesium B magnesium carbonate C magnesium hydroxide D magnesium oxide
1 marks
Answer: B
This question in 0654/11 May/June 2005
Q2 · The diagram shows acid being added to an alkali until it is neutralised 0654/11 Oct/Nov 2006
21 The diagram shows acid being added to an alkali until it is neutralised. acid flask alkali What happens in the flask? temperature type of reaction A decreases endothermic B decreases exothermic C increases endothermic D increases exothermic
1 marks
Answer: D
This question in 0654/11 Oct/Nov 2006
Q3 · In the extraction of iron, its ore is first treated with sulphuric acid 0654/11 May/June 2007
23 In the extraction of iron, its ore is first treated with sulphuric acid. This leaves a solid waste which contains unreacted acid. The best way of treating this waste is to neutralise the acid. How could this be done? A by adding lime B by adding rock salt C by adding sand D by adding water
1 marks
Answer: A
This question in 0654/11 May/June 2007
Q4 · A reagent in solution is added to a solid sample of a fertiliser 0654/11 Oct/Nov 2007
21 A reagent in solution is added to a solid sample of a fertiliser. The mixture is warmed and the gas given off changes the colour of damp litmus paper. The test shows that the fertiliser contains ammonium ions. What is the reagent and what is the original colour of the litmus paper used in the test? reagent colour of litmus paper A acid blue B acid red C alkali blue D alkali red
1 marks
Answer: D
This question in 0654/11 Oct/Nov 2007
Q5 · Ammonia and sulphur dioxide are bubbled into separate samples of water 0654/11 May/June 2008
23 Ammonia and sulphur dioxide are bubbled into separate samples of water. What are the pH values of the resulting solutions? aqueous ammonia aqueous sulphur dioxide A higher than 7 higher than 7 B higher than 7 lower than 7 C lower than 7 higher than 7 D lower than 7 lower than 7
1 marks
Answer: B
This question in 0654/11 May/June 2008
Q6 · A soil is treated with lime 0654/11 Oct/Nov 2008
23 A soil is treated with lime. As a result, a plant that was growing well becomes discoloured and
dies.
Which conditions suit the plant?
likes calcium likes
ions in soil alkaline soil
A Jv v key
B v x ¥ = correct
Cc x v X = not correct
D x x
1 marks
Answer: D
This question in 0654/11 Oct/Nov 2008
Q7 · The waste from a factory is acidic 0654/11 May/June 2009
21 The waste from a factory is acidic. The factory treats the waste with lime. Which pH change takes place? pH of waste pH of treated waste A 6 5 B 6 7 C 8 7 D 8 9
1 marks
Answer: B
This question in 0654/11 May/June 2009
Q8 · An acid reacts with an alkali 0654/11 Oct/Nov 2009
21 An acid reacts with an alkali. Which type of reaction and which temperature change takes place? type of reaction temperature change A endothermic decrease B endothermic increase C exothermic decrease D exothermic increase
1 marks
Answer: D
This question in 0654/11 Oct/Nov 2009
Q9 · Ammonium sulfate is heated with solution X and ammonia gas is given off 0654/11 May/June 2010
21 Ammonium sulfate is heated with solution X and ammonia gas is given off. A piece of moist red litmus paper and a piece of moist blue litmus paper are held in the gas. red litmus paper blue litmus paper ammonia gas ammonium sulfate and solution X heat What is solution X and what will be the colour change of the litmus paper? colour change of solution X litmus paper A hydrochloric acid blue to red B hydrochloric acid red to blue C sodium hydroxide blue to red D sodium hydroxide red to blue
1 marks
Answer: D
This question in 0654/11 May/June 2010
Q10 · Sodium hydroxide solution is added to hydrochloric acid 0654/11 May/June 2011
22 Sodium hydroxide solution is added to hydrochloric acid. thermometer sodium hydroxide solution hydrochloric acid Which shows how the pH and temperature change as the reaction takes place? pH temperature A decrease decrease B decrease increase C increase decrease D increase increase
1 marks
Answer: D
This question in 0654/11 May/June 2011
Q11 · Sodium hydroxide solution is added to hydrochloric acid 0654/12 May/June 2011
21 Sodium hydroxide solution is added to hydrochloric acid. thermometer sodium hydroxide solution hydrochloric acid Which shows how the pH and temperature change as the reaction takes place? pH temperature A decrease decrease B decrease increase C increase decrease D increase increase
1 marks
Answer: D
This question in 0654/12 May/June 2011
Q12 · Sodium hydroxide solution is added to hydrochloric acid 0654/13 May/June 2011
21 Sodium hydroxide solution is added to hydrochloric acid. thermometer sodium hydroxide solution hydrochloric acid Which shows how the pH and temperature change as the reaction takes place? pH temperature A decrease decrease B decrease increase C increase decrease D increase increase
1 marks
Answer: D
This question in 0654/13 May/June 2011
Q13 · What happens when an acid reacts with an alkali? 0654/11 Oct/Nov 2011
22 What happens when an acid reacts with an alkali? A Neutralisation takes place and the temperature falls. B Neutralisation takes place and the temperature rises. C Reduction takes place and the temperature falls. D Reduction takes place and the temperature rises.
1 marks
Answer: B
This question in 0654/11 Oct/Nov 2011
Q14 · What happens when an acid reacts with an alkali? 0654/12 Oct/Nov 2011
23 What happens when an acid reacts with an alkali? A Neutralisation takes place and the temperature falls. B Neutralisation takes place and the temperature rises. C Reduction takes place and the temperature falls. D Reduction takes place and the temperature rises.
1 marks
Answer: B
This question in 0654/12 Oct/Nov 2011
Q15 · What happens when an acid reacts with an alkali? 0654/13 Oct/Nov 2011
24 What happens when an acid reacts with an alkali? A Neutralisation takes place and the temperature falls. B Neutralisation takes place and the temperature rises. C Reduction takes place and the temperature falls. D Reduction takes place and the temperature rises.
1 marks
Answer: B
This question in 0654/13 Oct/Nov 2011
Q16 · Universal Indicator solution is added to test-tubes W, X and Y 0654/11 May/June 2012
20 Universal Indicator solution is added to test-tubes W, X and Y. W X Y dilute aqueous aqueous hydrochloric acid sodium hydroxide sodium chloride What are the colours of the Universal Indicator? in W in X in Y A green red purple B purple green red C red green purple D red purple green
1 marks
Answer: C
This question in 0654/11 May/June 2012
Q17 · Which box contains a solution of a metal oxide? 0654/12 May/June 2012
20 Which box contains a solution of a metal oxide? A B C D acidic acidic alkaline alkaline pH3 pH11 pH3 pH11
1 marks
Answer: D
This question in 0654/12 May/June 2012
Q18 · Which box contains a solution of a metal oxide? 0654/13 May/June 2012
20 Which box contains a solution of a metal oxide? A B C D acidic acidic alkaline alkaline pH3 pH11 pH3 pH11
1 marks
Answer: D
This question in 0654/13 May/June 2012
Q19 · When ammonium sulfate is heated with solution X, ammonia gas is given off 0654/11 May/June 2013
18 When ammonium sulfate is heated with solution X, ammonia gas is given off. A piece of moist red litmus paper and a piece of moist blue litmus paper are held in the gas. red litmus paper blue litmus paper ammonia gas ammonium sulfate and solution X heat What is solution X and how does the colour of the litmus paper change? colour change of solution X litmus paper A hydrochloric acid blue to red B hydrochloric acid red to blue C sodium hydroxide blue to red D sodium hydroxide red to blue
1 marks
Answer: D
This question in 0654/11 May/June 2013
Q20 · Which household substances are acidic? 0654/11 May/June 2013
21 Which household substances are acidic? table salt lemon sugar vinegar solution juice solution A ✓ ✓ ✗ ✗ key B ✓ ✗ ✓ ✗ ✓= yes C ✗ ✓ ✗ ✓ ✗= no D ✗ ✗ ✓ ✓
1 marks
Answer: C
This question in 0654/11 May/June 2013
Q21 · Why do farmers add lime to soil? 0654/11 May/June 2013
25 Why do farmers add lime to soil? A It acts as a fertiliser. B It adds nitrogen to the soil. C It decreases the pH of the soil. D It increases the pH of the soil.
1 marks
Answer: D
This question in 0654/11 May/June 2013
Q22 · Which react(s) with ammonia? 0654/12 May/June 2013
16 Which react(s) with ammonia? hydrochloric sodium acid hydroxide A ✓ ✓ key B ✓ ✗ ✓= react C ✗ ✓ ✗= does not react D ✗ ✗
1 marks
Answer: B
This question in 0654/12 May/June 2013
Q23 · When ammonium sulfate is heated with solution X, ammonia gas is given off 0654/12 May/June 2013
18 When ammonium sulfate is heated with solution X, ammonia gas is given off. A piece of moist red litmus paper and a piece of moist blue litmus paper are held in the gas. red litmus paper blue litmus paper ammonia gas ammonium sulfate and solution X heat What is solution X and how does the colour of the litmus paper change? colour change of solution X litmus paper A hydrochloric acid blue to red B hydrochloric acid red to blue C sodium hydroxide blue to red D sodium hydroxide red to blue
1 marks
Answer: D
This question in 0654/12 May/June 2013
Q24 · An acid is added to an alkali until the final solution is just neutral 0654/12 May/June 2013
24 An acid is added to an alkali until the final solution is just neutral. The reaction is exothermic. Which graph shows how the temperature changes as the acid is added to the alkali? A B start start temperature temperature 0 volume of acid 0 volume of acid C D start start temperature temperature 0 volume of acid 0 volume of acid
1 marks
Answer: D
This question in 0654/12 May/June 2013
Q25 · When ammonium sulfate is heated with solution X, ammonia gas is given off 0654/13 May/June 2013
19 When ammonium sulfate is heated with solution X, ammonia gas is given off. A piece of moist red litmus paper and a piece of moist blue litmus paper are held in the gas. red litmus paper blue litmus paper ammonia gas ammonium sulfate and solution X heat What is solution X and how does the colour of the litmus paper change? colour change of solution X litmus paper A hydrochloric acid blue to red B hydrochloric acid red to blue C sodium hydroxide blue to red D sodium hydroxide red to blue
1 marks
Answer: D
This question in 0654/13 May/June 2013
Q26 · Which household substances are acidic? 0654/13 May/June 2013
24 Which household substances are acidic? table salt lemon sugar vinegar solution juice solution A ✓ ✓ ✗ ✗ key B ✓ ✗ ✓ ✗ ✓= yes C ✗ ✓ ✗ ✓ ✗= no D ✗ ✗ ✓ ✓
1 marks
Answer: C
This question in 0654/13 May/June 2013
Q27 · Why do farmers add lime to soil? 0654/13 May/June 2013
26 Why do farmers add lime to soil? A It acts as a fertiliser. B It adds nitrogen to the soil. C It decreases the pH of the soil. D It increases the pH of the soil.
1 marks
Answer: D
This question in 0654/13 May/June 2013
Q28 · A label from a packet of indigestion tablets is shown 0654/11 Oct/Nov 2013
23 A label from a packet of indigestion tablets is shown. Each tablet contains: magnesium carbonate 120 mg magnesium hydroxide 15 mg magnesium oxide 62 mg magnesium sulfate 47 mg Which substance does not neutralise stomach acid? A magnesium carbonate B magnesium hydroxide C magnesium oxide D magnesium sulfate
1 marks
Answer: D
This question in 0654/11 Oct/Nov 2013
Q29 · Which type of reaction and which temperature change take place when an acid reacts with… 0654/11 Oct/Nov 2013
25 Which type of reaction and which temperature change take place when an acid reacts with an alkali? type of reaction temperature change A endothermic decrease B endothermic increase C exothermic decrease D exothermic increase
1 marks
Answer: D
This question in 0654/11 Oct/Nov 2013
Q30 · Which graph shows how the pH of the soil changes when lime is added? 0654/11 Oct/Nov 2013
26 Which graph shows how the pH of the soil changes when lime is added? A B 7 7 soil soil pH pH time time C D 7 7 soil soil pH pH time time
1 marks
Answer: D
This question in 0654/11 Oct/Nov 2013
Q31 · A label from a packet of indigestion tablets is shown 0654/12 Oct/Nov 2013
23 A label from a packet of indigestion tablets is shown. Each tablet contains: magnesium carbonate 120 mg magnesium hydroxide 15 mg magnesium oxide 62 mg magnesium sulfate 47 mg Which substance does not neutralise stomach acid? A magnesium carbonate B magnesium hydroxide C magnesium oxide D magnesium sulfate
1 marks
Answer: D
This question in 0654/12 Oct/Nov 2013
Q32 · Which type of reaction and which temperature change take place when an acid reacts with… 0654/12 Oct/Nov 2013
25 Which type of reaction and which temperature change take place when an acid reacts with an alkali? type of reaction temperature change A endothermic decrease B endothermic increase C exothermic decrease D exothermic increase
1 marks
Answer: D
This question in 0654/12 Oct/Nov 2013
Q33 · Which graph shows how the pH of the soil changes when lime is added? 0654/12 Oct/Nov 2013
26 Which graph shows how the pH of the soil changes when lime is added? A B 7 7 soil soil pH pH time time C D 7 7 soil soil pH pH time time
1 marks
Answer: D
This question in 0654/12 Oct/Nov 2013
Q34 · Which type of reaction and which temperature change take place when an acid reacts with… 0654/13 Oct/Nov 2013
24 Which type of reaction and which temperature change take place when an acid reacts with an alkali? type of reaction temperature change A endothermic decrease B endothermic increase C exothermic decrease D exothermic increase
1 marks
Answer: D
This question in 0654/13 Oct/Nov 2013
Q35 · Four substances are added to an acid 0654/11 May/June 2015
20 Four substances are added to an acid. The substances are 1 calcium oxide 2 magnesium carbonate 3 sodium chloride 4 sodium hydroxide Which substances neutralise the acid? A 1 only B 1, 2 and 4 C 3 and 4 D 4 only
1 marks
Answer: B
This question in 0654/11 May/June 2015
Q36 · Lime is manufactured by heating limestone 0654/11 Oct/Nov 2015
20 Lime is manufactured by heating limestone. Lime is used to control the acidity of soil. Which types of chemical change occur in these two reactions? heating limestone controlling acidity A endothermic oxidation B endothermic neutralisation C exothermic oxidation D exothermic neutralisation
1 marks
Answer: B
This question in 0654/11 Oct/Nov 2015
Q37 · Lime is manufactured by heating limestone 0654/12 Oct/Nov 2015
20 Lime is manufactured by heating limestone. Lime is used to control the acidity of soil. Which types of chemical change occur in these two reactions? heating limestone controlling acidity A endothermic oxidation B endothermic neutralisation C exothermic oxidation D exothermic neutralisation
1 marks
Answer: B
This question in 0654/12 Oct/Nov 2015
Q38 · Which chemical is used to reduce the acidity of soil? 0654/12 Oct/Nov 2015
26 Which chemical is used to reduce the acidity of soil? A ammonium nitrate B calcium oxide C magnesium sulfate D potassium chloride
1 marks
Answer: B
This question in 0654/12 Oct/Nov 2015
Q39 · Lime is manufactured by heating limestone 0654/13 Oct/Nov 2015
19 Lime is manufactured by heating limestone. Lime is used to control the acidity of soil. Which types of chemical change occur in these two reactions? heating limestone controlling acidity A endothermic oxidation B endothermic neutralisation C exothermic oxidation D exothermic neutralisation
1 marks
Answer: B
This question in 0654/13 Oct/Nov 2015
Q40 · In a manned spacecraft, carbon dioxide is removed from the air by reacting with potassium… 0654/11 May/June 2016
19 In a manned spacecraft, carbon dioxide is removed from the air by reacting with potassium hydroxide. Which type of reaction occurs? A decomposition B neutralisation C precipitation D redox
1 marks
Answer: B
This question in 0654/11 May/June 2016
Q41 · Which graph shows how the pH of soil changes when lime is added? 0654/11 May/June 2016
26 Which graph shows how the pH of soil changes when lime is added? A B 7 7 soil soil pH pH time time C D 7 7 soil soil pH pH time time
1 marks
Answer: D
This question in 0654/11 May/June 2016
Q42 · Which graph shows how the pH of soil changes when lime is added? 0654/12 May/June 2016
26 Which graph shows how the pH of soil changes when lime is added? A B 7 7 soil soil pH pH time time C D 7 7 soil soil pH pH time time
1 marks
Answer: D
This question in 0654/12 May/June 2016
Q43 · Which graph shows how the pH of soil changes when lime is added? 0654/13 May/June 2016
25 Which graph shows how the pH of soil changes when lime is added? A B 7 7 soil soil pH pH time time C D 7 7 soil soil pH pH time time
1 marks
Answer: D
This question in 0654/13 May/June 2016
Q44 · Which type of reaction and which temperature change take place when an acid reacts with… 0654/11 Oct/Nov 2016
18 Which type of reaction and which temperature change take place when an acid reacts with an alkali? type of reaction temperature change A endothermic decrease B endothermic increase C exothermic decrease D exothermic increase
1 marks
Answer: D
This question in 0654/11 Oct/Nov 2016
Q45 · Which type of reaction and which temperature change take place when an acid reacts with… 0654/12 Oct/Nov 2016
18 Which type of reaction and which temperature change take place when an acid reacts with an alkali? type of reaction temperature change A endothermic decrease B endothermic increase C exothermic decrease D exothermic increase
1 marks
Answer: D
This question in 0654/12 Oct/Nov 2016
Q46 · What is used to reduce the acidity of soil? 0654/12 Oct/Nov 2016
26 What is used to reduce the acidity of soil? A fertiliser B lime C magnesium ions D sand
1 marks
Answer: B
This question in 0654/12 Oct/Nov 2016
Q47 · The pH of water changes when ammonia is bubbled into it 0654/11 May/June 2017
20 The pH of water changes when ammonia is bubbled into it. What happens to the pH and why? pH ammonia is A decreases acidic B decreases alkaline C increases acidic D increases alkaline
1 marks
Answer: D
This question in 0654/11 May/June 2017
Q48 · Why do farmers add lime to soil? 0654/11 May/June 2017
26 Why do farmers add lime to soil? A It acts as a fertiliser. B It adds nitrogen to the soil. C It decreases the pH of the soil. D It increases the pH of the soil.
1 marks
Answer: D
This question in 0654/11 May/June 2017
Q49 · The pH of water changes when ammonia is bubbled into it 0654/12 May/June 2017
20 The pH of water changes when ammonia is bubbled into it. What happens to the pH and why? pH ammonia is A decreases acidic B decreases alkaline C increases acidic D increases alkaline
1 marks
Answer: D
This question in 0654/12 May/June 2017
Q50 · Why do farmers add lime to soil? 0654/12 May/June 2017
26 Why do farmers add lime to soil? A It acts as a fertiliser. B It adds nitrogen to the soil. C It decreases the pH of the soil. D It increases the pH of the soil.
1 marks
Answer: D
This question in 0654/12 May/June 2017
Q51 · The pH of water changes when ammonia is bubbled into it 0654/13 May/June 2017
20 The pH of water changes when ammonia is bubbled into it. What happens to the pH and why? pH ammonia is A decreases acidic B decreases alkaline C increases acidic D increases alkaline
1 marks
Answer: D
This question in 0654/13 May/June 2017
Q52 · Why do farmers add lime to soil? 0654/13 May/June 2017
26 Why do farmers add lime to soil? A It acts as a fertiliser. B It adds nitrogen to the soil. C It decreases the pH of the soil. D It increases the pH of the soil.
1 marks
Answer: D
This question in 0654/13 May/June 2017
Q53 · Which chemical is used to reduce the acidity of soil? 0654/11 Oct/Nov 2018
26 Which chemical is used to reduce the acidity of soil? A ammonium nitrate B calcium oxide C magnesium sulfate D potassium chloride
1 marks
Answer: B
This question in 0654/11 Oct/Nov 2018
Q54 · Lemonade turns blue litmus solution red 0654/12 Oct/Nov 2018
21 Lemonade turns blue litmus solution red. dropper blue litmus solution LEMONADE What does this colour change show about the lemonade? A It is acidic. B It is alkaline. C It is fizzy. D It is neutral.
1 marks
Answer: A
This question in 0654/12 Oct/Nov 2018
Q55 · Which chemical is used to reduce the acidity of soil? 0654/12 Oct/Nov 2018
26 Which chemical is used to reduce the acidity of soil? A ammonium nitrate B calcium oxide C magnesium sulfate D potassium chloride
1 marks
Answer: B
This question in 0654/12 Oct/Nov 2018
Q56 · An oxide of element X neutralises a dilute acid 0654/13 Oct/Nov 2018
21 An oxide of element X neutralises a dilute acid. What is X? A carbon B hydrogen C magnesium D sulfur
1 marks
Answer: C
This question in 0654/13 Oct/Nov 2018
Q57 · Which chemical is used to reduce the acidity of soil? 0654/13 Oct/Nov 2018
26 Which chemical is used to reduce the acidity of soil? A ammonium nitrate B calcium oxide C magnesium sulfate D potassium chloride
1 marks
Answer: B
This question in 0654/13 Oct/Nov 2018
Q58 · An acid is added to an alkali until the final solution is just neutral 0654/11 May/June 2019
17 An acid is added to an alkali until the final solution is just neutral. The reaction is exothermic. Which graph shows how the temperature changes as the acid is being added to the alkali? A B start start temperature temperature 0 volume of acid 0 volume of acid C D start start temperature temperature 0 volume of acid 0 volume of acid
1 marks
Answer: C
This question in 0654/11 May/June 2019
Q59 · Which two statements about calcium carbonate are correct? 0654/11 May/June 2019
25 Which two statements about calcium carbonate are correct? 1 It neutralises acidic industrial waste. 2 It lowers the pH of soil. 3 It undergoes thermal decomposition to calcium hydroxide. 4 It reacts with dilute hydrochloric acid to form carbon dioxide. A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4
1 marks
Answer: B
This question in 0654/11 May/June 2019
Q60 · The pH values of four liquids are 1, 4, 7 and 13 0654/11 Oct/Nov 2019
21 The pH values of four liquids are 1, 4, 7 and 13. The four liquids are distilled water, nitric acid, potassium hydroxide and vinegar. Which row shows the pH values of the liquids? potassium distilled water nitric acid vinegar hydroxide A 4 7 13 1 B 4 13 7 1 C 7 1 4 13 D 7 1 13 4
1 marks
Answer: D
This question in 0654/11 Oct/Nov 2019
Q61 · An acid neutralises solution X 0654/12 Oct/Nov 2019
20 An acid neutralises solution X. A neutral solution is formed. What are the pH values of solution X and of the neutral solution? pH of solution X pH of neutral solution A 2 7 B 2 12 C 12 2 D 12 7
1 marks
Answer: D
This question in 0654/12 Oct/Nov 2019
Q62 · Which substances neutralise acids? 0654/12 Oct/Nov 2019
25 Which substances neutralise acids? 1 lime 2 limestone 3 calcium hydroxide A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3
1 marks
Answer: D
This question in 0654/12 Oct/Nov 2019
Q63 · Limestone is converted to lime in process 1 0654/11 May/June 2020
25 Limestone is converted to lime in process 1. Limestone is used to treat industrial waste in process 2. What are processes 1 and 2? process 1 process 2 A decomposition dissolving B decomposition neutralisation C oxidation dissolving D oxidation neutralisation
1 marks
Answer: B
This question in 0654/11 May/June 2020
Q64 · Which process does not produce carbon dioxide? 0654/12 Oct/Nov 2020
24 Which process does not produce carbon dioxide? A acid reacting with a metal B acid reacting with sodium carbonate C complete combustion of methane D respiration
1 marks
Answer: A
This question in 0654/12 Oct/Nov 2020
Q65 · Some soil is treated with limestone to make it neutral 0654/12 Oct/Nov 2020
25 Some soil is treated with limestone to make it neutral. What is the pH of the soil before it is treated? A 5 B 7 C 9 D 11
1 marks
Answer: A
This question in 0654/12 Oct/Nov 2020
Q66 · A label from a packet of indigestion tablets is shown 0654/12 Feb/March 2021
20 A label from a packet of indigestion tablets is shown. Each tablet contains: magnesium carbonate 120 mg magnesium hydroxide 15 mg magnesium oxide 62 mg magnesium sulfate 47 mg Which substance does not neutralise stomach acid? A magnesium carbonate B magnesium hydroxide C magnesium oxide D magnesium sulfate
1 marks
Answer: D
This question in 0654/12 Feb/March 2021
Q67 · What reacts with ammonia gas? 0654/11 May/June 2021
20 What reacts with ammonia gas?
hydrochloric sodium
acid hydroxide
A Jv J
B Jv x
Cc x v
D x x
key
Jv = reacts
X = does not react
1 marks
Answer: B
This question in 0654/11 May/June 2021
Q68 · What reacts with ammonia gas? 0654/12 May/June 2021
20 What reacts with ammonia gas?
hydrochloric sodium
acid hydroxide
A Jv J
B Jv x
Cc x v
D x x
key
Jv = reacts
X = does not react
1 marks
Answer: B
This question in 0654/12 May/June 2021
Q69 · What reacts with ammonia gas? 0654/13 May/June 2021
20 What reacts with ammonia gas?
hydrochloric sodium
acid hydroxide
A Jv J
B Jv x
Cc x v
D x x
key
Jv = reacts
X = does not react
1 marks
Answer: B
This question in 0654/13 May/June 2021
Q70 · The colour of universal indicator in solutions S, T and U is shown 0654/11 Oct/Nov 2021
20 The colour of universal indicator in solutions S, T and U is shown. solution S T U colour of universal indicator orange green purple Which row shows the pH values of the solutions? S T U A 1 5 9 B 1 7 14 C 4 5 9 D 4 7 14
1 marks
Answer: D
This question in 0654/11 Oct/Nov 2021
Q71 · Calcium carbonate (limestone) is a base 0654/11 Oct/Nov 2021
25 Calcium carbonate (limestone) is a base. Which uses of limestone depend on it acting as a base? 1 making lime 2 neutralising acid waste 3 stone buildings 4 treatment of soil A 1 and 2 B 2 and 3 C 2 and 4 D 3 and 4
1 marks
Answer: C
This question in 0654/11 Oct/Nov 2021
Q72 · Which compound is used to neutralise acidic gases? 0654/12 Oct/Nov 2021
25 Which compound is used to neutralise acidic gases? A calcium carbonate B calcium chloride C calcium phosphate D calcium sulfate
1 marks
Answer: A
This question in 0654/12 Oct/Nov 2021
Q73 · Which substances neutralise acids? 0654/12 Feb/March 2022
25 Which substances neutralise acids? 1 lime 2 limestone 3 calcium hydroxide A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3
1 marks
Answer: D
This question in 0654/12 Feb/March 2022
Q74 · Why do farmers add limestone to soil? 0654/11 May/June 2022
26 Why do farmers add limestone to soil? A It acts as a fertiliser. B It adds nitrogen to the soil. C It decreases the pH of the soil. D It increases the pH of the soil.
1 marks
Answer: D
This question in 0654/11 May/June 2022
Q75 · Why do farmers add limestone to soil? 0654/12 May/June 2022
26 Why do farmers add limestone to soil? A It acts as a fertiliser. B It adds nitrogen to the soil. C It decreases the pH of the soil. D It increases the pH of the soil.
1 marks
Answer: D
This question in 0654/12 May/June 2022
Q76 · Why do farmers add limestone to soil? 0654/13 May/June 2022
26 Why do farmers add limestone to soil? A It acts as a fertiliser. B It adds nitrogen to the soil. C It decreases the pH of the soil. D It increases the pH of the soil.
1 marks
Answer: D
This question in 0654/13 May/June 2022
Q77 · Copper carbonate is reacted with dilute hydrochloric acid 0654/11 Oct/Nov 2022
20 Copper carbonate is reacted with dilute hydrochloric acid. Which gas is given off? A carbon dioxide B hydrogen C nitrogen D sulfur dioxide
1 marks
Answer: A
This question in 0654/11 Oct/Nov 2022
Q78 · What is not a use of limestone? 0654/11 Oct/Nov 2022
26 What is not a use of limestone? A manufacture of calcium oxide B neutralising industrial waste products C purifying water D treating acidic soil
1 marks
Answer: C
This question in 0654/11 Oct/Nov 2022
Q79 · Indigestion is caused by excess hydrochloric acid in the stomach 0654/12 Oct/Nov 2022
20 Indigestion is caused by excess hydrochloric acid in the stomach. Which substance can be used to neutralise the acid? substance pH A vinegar 4 B orange juice 6 C water 7 D baking powder 9
1 marks
Answer: D
This question in 0654/12 Oct/Nov 2022
Q80 · A metal oxide powder is added to a dilute acid 0654/13 Oct/Nov 2022
18 A metal oxide powder is added to a dilute acid. The initial temperature of the acid is 21 C. The pH of the acid is 2. When all the acid has reacted, the temperature of the reaction mixture is 23 C and the pH is 7. Which statement describes this reaction? A It is endothermic and neutralisation. B It is endothermic and oxidation. C It is exothermic and neutralisation D It is exothermic and oxidation.
1 marks
Answer: C
This question in 0654/13 Oct/Nov 2022
Q81 · Potassium oxide and sulfur dioxide are both soluble in water 0654/12 May/June 2023
21 Potassium oxide and sulfur dioxide are both soluble in water. Which row describes properties of these oxides? pH in aqueous effect on damp oxide solution red litmus A potassium oxide 14 turns blue B potassium oxide 2 stays red C sulfur dioxide 14 stays red D sulfur dioxide 2 turns blue
1 marks
Answer: A
This question in 0654/12 May/June 2023
Q82 · Potassium oxide and sulfur dioxide are both soluble in water 0654/13 May/June 2023
21 Potassium oxide and sulfur dioxide are both soluble in water. Which row describes properties of these oxides? pH in aqueous effect on damp oxide solution red litmus A potassium oxide 14 turns blue B potassium oxide 2 stays red C sulfur dioxide 14 stays red D sulfur dioxide 2 turns blue
1 marks
Answer: A
This question in 0654/13 May/June 2023
Q83 · Solid S is added to dilute hydrochloric acid in the apparatus shown 0654/12 Oct/Nov 2023
19 Solid S is added to dilute hydrochloric acid in the apparatus shown. solid S + dilute hydrochloric acid universal indicator solution The universal indicator solution shows the pH decreases. What is solid S? A zinc B zinc carbonate C zinc hydroxide D zinc oxide
1 marks
Answer: B
This question in 0654/12 Oct/Nov 2023
Q84 · What reacts with ammonia gas? 0654/12 Feb/March 2024
21 What reacts with ammonia gas?
hydrochloric sodium
acid hydroxide
Jv Jv
Jv x
x Jv
x x
key
Jv = reacts
X = does not react
1 marks
Answer: B
This question in 0654/12 Feb/March 2024
Q85 · The waste from a factory is acidic 0654/12 May/June 2024
20 The waste from a factory is acidic. The factory treats the waste with limestone. Which row shows the pH of the waste before and after treatment? before after A 6 5 B 6 7 C 8 7 D 8 9
1 marks
Answer: B
This question in 0654/12 May/June 2024
Q86 · The waste from a factory is acidic 0654/13 May/June 2024
20 The waste from a factory is acidic. The factory treats the waste with limestone. Which row shows the pH of the waste before and after treatment? before after A 6 5 B 6 7 C 8 7 D 8 9
1 marks
Answer: B
This question in 0654/13 May/June 2024
Q87 · What are two uses of limestone? 0654/12 Oct/Nov 2024
25 What are two uses of limestone? 1 as a fertiliser 2 to decrease the pH of soil 3 making lime 4 neutralising some industrial waste products A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4
1 marks
Answer: D
This question in 0654/12 Oct/Nov 2024
Q88 · Substance Y is added to water containing universal indicator 0654/12 Oct/Nov 2025
22 Substance Y is added to water containing universal indicator. The pH of the mixture increases. What is Y? A HCl B K C NaCl D SO2
1 marks
Answer: B
This question in 0654/12 Oct/Nov 2025
Q89 · Substance Y is added to water containing universal indicator 0654/13 Oct/Nov 2025
22 Substance Y is added to water containing universal indicator. The pH of the mixture increases. What is Y? A HCl B K C NaCl D SO2
1 marks
Answer: B
This question in 0654/13 Oct/Nov 2025
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