Preparation of salts — Paper 1 · IGCSE Sciences - Co-ordinated (Double) 0654

22 From which carbonate is lime manufactured? A calcium carbonate B lead(II) carbonate C magnesium carbonate D zinc carbonate

1 marks

Answer: A

This question in 0654/11 May/June 2009

26 Lime is manufactured from limestone and is used for treating industrial waste. Which row describes the type of reaction involved in the manufacture of lime and in the treatment of industrial waste? manufacture waste treatment A reduction neutralisation B reduction oxidation C thermal decomposition neutralisation D thermal decomposition oxidation

1 marks

Answer: C

This question in 0654/11 May/June 2015

20 The equation shown is incomplete. acid + alkali → X + water What is X? A base B carbon dioxide C hydrogen D salt

1 marks

Answer: D

This question in 0654/13 May/June 2015

22 Sulfuric acid and sodium carbonate react and release a colourless gas. sulfuric acid colourless gas gas jar sodium carbonate trough of water What is the gas? A carbon dioxide B hydrogen C hydrogen sulfide D sulfur dioxide

1 marks

Answer: A

This question in 0654/12 Oct/Nov 2015

25 Which anion is present in limestone? A carbonate CO3 2– B nitrate NO3 – C oxide O2– D sulfate SO4 2–

1 marks

Answer: A

This question in 0654/13 Oct/Nov 2015

14 A student adds excess copper oxide powder to warm dilute sulfuric acid. Copper sulfate solution is formed. Which method is used to remove the unreacted copper oxide? A chromatography B crystallisation C distillation D filtration

1 marks

Answer: D

This question in 0654/13 May/June 2016

20 Copper sulfate is made when copper carbonate is added to dilute sulfuric acid. The copper carbonate is added until no more carbon dioxide is given off. The mixture is … 1 … to remove excess copper carbonate. The resulting solution is then … 2 … to decrease the volume. This solution is then … 3 … to allow the formation of pure copper sulfate crystals. Which words complete gaps 1, 2 and 3? 1 2 3 A boiled heated left to cool B filtered cooled left to cool C filtered heated evaporated to dryness D filtered heated left to cool

1 marks

Answer: D

This question in 0654/12 Oct/Nov 2016

22 Which substances react with dilute sulfuric acid to form a salt? magnesium magnesium oxide magnesium carbonate magnesium chloride

1 marks

Answer: A

This question in 0654/11 Oct/Nov 2017

22 Which substances react with dilute sulfuric acid to form a salt? magnesium | ™agnesium | magnesium | magnesium oxide carbonate chloride A v 4 W, x B WA V4 x y, Cc v x W, y, D x V4 W, y,

1 marks

Answer: A

This question in 0654/12 Oct/Nov 2017

22 Which substances react with dilute sulfuric acid to form a salt? magnesium | ™agnesium | magnesium | magnesium oxide carbonate chloride A v 4 W, x B WA V4 x y, Cc v x W, y, D x V4 W, y,

1 marks

Answer: A

This question in 0654/13 Oct/Nov 2017

23 An acid reacts with an alkali to produce an aqueous solution of a salt. Which procedure is used to obtain crystals of the salt from the solution? A Distil the solution. B Evaporate the solution to dryness. C Filter the solution. D Partially evaporate the solution and leave it to cool.

1 marks

Answer: D

This question in 0654/13 Oct/Nov 2017

20 Hydrochloric acid and sodium hydroxide neutralise each other to form water and sodium chloride. Which method is used to make the solution crystallise? A chromatography B evaporation C filtration D fractional distillation

1 marks

Answer: B

This question in 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

24 Which processes produce carbon dioxide? 1 acid reacting with a metal 2 respiration 3 combustion of ethanol 4 acid reacting with a metal oxide A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

1 marks

Answer: C

This question in 0654/13 Oct/Nov 2019

20 Copper sulfate is made by adding an excess of copper carbonate to dilute sulfuric acid and stirring. The excess solid is removed. Most of the water is then removed. The solution is left for solid copper sulfate to form. In which order is apparatus used? A Bunsen burner, tripod and flask → filter funnel → crystallising dish B Bunsen burner, tripod and flask → crystallising dish → filter funnel C filter funnel → crystallising dish → Bunsen burner, tripod and flask D filter funnel → Bunsen burner, tripod and flask → crystallising dish

1 marks

Answer: D

This question in 0654/11 May/June 2020

20 Zinc oxide is an insoluble base. It reacts with dilute hydrochloric acid to produce zinc chloride. Zinc chloride is soluble in water. Which statement about the preparation of zinc chloride crystals is correct? A Once the reaction is complete there is no need to filter the reaction mixture. B The reaction mixture is neutral at the point that no more zinc oxide reacts. C Zinc chloride crystals are obtained by evaporation to dryness. D Zinc chloride precipitates when the solution becomes neutral.

1 marks

Answer: B

This question in 0654/12 May/June 2020

20 Which compound is prepared by reacting an acid with a base? A calcium oxide B copper hydroxide C hydrogen chloride D magnesium sulfate

1 marks

Answer: D

This question in 0654/12 Oct/Nov 2020

21 Salts are made by reacting dilute hydrochloric acid with four substances. 1 magnesium 2 magnesium carbonate 3 magnesium hydroxide 4 magnesium oxide Which substances produce a gas when reacted with dilute hydrochloric acid? A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4

1 marks

Answer: A

This question in 0654/13 Oct/Nov 2020

21 Substance X is insoluble in water. It reacts with dilute nitric acid to produce solution Y and a gas which turns limewater milky. A white precipitate is formed when aqueous sodium hydroxide is added to solution Y. This precipitate remains when excess sodium hydroxide is added. What is substance X? A calcium carbonate B calcium chloride C zinc carbonate D zinc chloride

1 marks

Answer: A

This question in 0654/12 Feb/March 2021

21 Magnesium chloride is prepared by reacting an excess of insoluble magnesium oxide with dilute hydrochloric acid. Which processes are used to obtain pure crystals of magnesium chloride from the reaction mixture? 1 distillation 2 evaporation 3 filtration A 1 followed by 2 B 3 followed by 2 C 3 followed by 1 D 1 followed by 3, followed by 2

1 marks

Answer: B

This question in 0654/11 May/June 2023

25 Which statements about limestone are correct? 1 It contains calcium oxide. 2 It is used to manufacture lime. 3 It neutralises acidic industrial waste products. 4 It neutralises alkaline soil. A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

1 marks

Answer: C

This question in 0654/13 May/June 2023

22 Salts are made when four substances react separately with dilute hydrochloric acid. 1 magnesium 2 magnesium carbonate 3 magnesium hydroxide 4 magnesium oxide Which substances produce a gas when reacted with dilute hydrochloric acid? A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4

1 marks

Answer: A

This question in 0654/11 May/June 2024

25 Which compound contains two of the three elements needed in a fertiliser used for plant growth? A potassium carbonate B potassium chloride C potassium nitrate D potassium sulfate

1 marks

Answer: C

This question in 0654/12 May/June 2024

25 Which compound contains two of the three elements needed in a fertiliser used for plant growth? A potassium carbonate B potassium chloride C potassium nitrate D potassium sulfate

1 marks

Answer: C

This question in 0654/13 May/June 2024

23 Copper sulfate is made when copper carbonate is added to dilute sulfuric acid. The copper carbonate is added until no more carbon dioxide is given off. The mixture is … 1 … to remove excess copper carbonate. The resulting solution is then … 2 … to decrease the volume. This solution is then … 3 … to allow the formation of pure copper sulfate crystals. Which words complete gaps 1, 2 and 3? 1 2 3 A boiled heated evaporated to dryness B filtered cooled left to cool C filtered heated evaporated to dryness D filtered heated left to cool

1 marks

Answer: D

This question in 0654/12 Feb/March 2025

21 Which type of substance reacts with an acid to produce a salt, water and a gas? A alkali B base C carbonate D metal

1 marks

Answer: C

This question in 0654/11 Oct/Nov 2025

23 An acid reacts with an alkali to produce an aqueous solution of a salt. Which procedure is used to obtain crystals of the salt from the solution? A Distil the solution. B Evaporate the solution to dryness. C Filter the solution. D Partially evaporate the solution and leave it to cool.

1 marks

Answer: D

This question in 0654/12 Oct/Nov 2025

23 An acid reacts with an alkali to produce an aqueous solution of a salt. Which procedure is used to obtain crystals of the salt from the solution? A Distil the solution. B Evaporate the solution to dryness. C Filter the solution. D Partially evaporate the solution and leave it to cool.

1 marks

Answer: D

This question in 0654/13 Oct/Nov 2025