Carboxylic acids — Paper 2 · IGCSE Chemistry (9-1) 0971

39 Which structural formula represents methyl propanoate? A CH3CH2COOCH3 B CH3COOCH2CH2CH3 C CH3CH2CH2COOCH3 D HCOOCH2CH2CH3

1 marks

Answer: A

This question in 0971/21 May/June 2018

36 Which two compounds are molecules which both contain a double bond? A ethane and ethanoic acid B ethane and ethanol C ethene and ethanoic acid D ethene and ethanol

1 marks

Answer: C

This question in 0971/22 Oct/Nov 2018

39 Which reaction can be used to make ethanoic acid? A oxidation of ethanol B oxidation of ethene C reduction of ethanol D reduction of ethene

1 marks

Answer: A

This question in 0971/22 Oct/Nov 2018

38 Which statements about aqueous ethanoic acid are correct? 1 Ethanoic acid contains the functional group –COOH. 2 Ethanoic acid reacts with carbonates to produce hydrogen. 3 Ethanoic acid turns Universal Indicator paper blue. 4 Ethanoic acid has a pH lower than pH 7. A 1 and 2 B 1 and 3 C 1 and 4 D 2 and 4

1 marks

Answer: C

This question in 0971/21 May/June 2019

38 Some properties of an organic compound J are listed. ● It is a liquid at room temperature. ● It is soluble in water. ● A solution of J reacts with calcium carbonate to form carbon dioxide. ● A solution of J has a pH of 3. In which homologous series does J belong? A alkane B alkene C alcohol D carboxylic acid

1 marks

Answer: D

This question in 0971/21 May/June 2020

38 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

1 marks

Answer: B

This question in 0971/22 May/June 2020

33 What is the structure of butanoic acid? A CH3CH2CO2H B CH3CH2CH2CO2H C CH3CH2CH2CH2CO2H D CH3CH2CH2CO2CH3

1 marks

Answer: B

This question in 0971/21 May/June 2021

34 Compound Z contains carbon, hydrogen and oxygen. Molecules of compound Z have four hydrogen atoms and two carbon atoms. Compound Z can be made by oxidation of an alcohol. What is compound Z? A ethene B ethanol C ethanoic acid D methyl methanoate

1 marks

Answer: C

This question in 0971/21 May/June 2021

34 Which statement about ethanol is not correct? A Ethanol can be made by fermentation. B Ethanol is oxidised to make ethanoic acid. C Ethanol reacts with oxygen exothermically, making it a good fuel. D Ethanol reacts with propanoic acid to make propyl ethanoate.

1 marks

Answer: D

This question in 0971/22 May/June 2021

37 Which statements about ethanoic acid are correct? 1 It is a strong acid. 2 It reacts with ethanol to form an ester. 3 It has the formula CH3COOH. A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

1 marks

Answer: C

This question in 0971/22 May/June 2021

33 What is the structure of the ester formed from ethanoic acid and propanol? A B H H O H H O H C C C H H H C C C H H H O C C H H H C H H H H C H O H C D H O H O H C C H C C H H H H H C H O C C C H H H C H H H H H C H O H

1 marks

Answer: D

This question in 0971/22 Oct/Nov 2021

35 The structure of ester W is shown. H O H C C H H O C H H Which row gives the names of ester W and the carboxylic acid and alcohol from which it is made? name of ester W carboxylic acid alcohol A ethyl methanoate ethanoic acid methanol B ethyl methanoate methanoic acid ethanol C methyl ethanoate ethanoic acid methanol D methyl ethanoate methanoic acid ethanol

1 marks

Answer: C

This question in 0971/22 May/June 2022

34 Methanoic acid and propan-1-ol react to form an ester. What is the structural formula of the ester? A HCOOCH2CH2CH3 B CH3CH2COOCH3 C CH3COOCH2CH3 D CH3CH2CH2COOH

1 marks

Answer: A

This question in 0971/22 May/June 2023

30 Propanoic acid is a carboxylic acid. It has similar chemical properties to ethanoic acid. Which statements are correct? 1 Aqueous propanoic acid is a weaker acid than dilute hydrochloric acid. 2 Propanoic acid partially ionises in aqueous solution. 3 Propanoic acid reacts with ethanol to form propyl ethanoate. A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

1 marks

Answer: B

This question in 0971/21 May/June 2024

34 The structures of two compounds used to make an ester are shown. H H O H H H C C C H C C OH H H OH H H What is the name of the ester? A ethyl propanoate B propyl ethanoate C ethyl ethanoate D propyl propanoate

1 marks

Answer: A

This question in 0971/22 May/June 2024

36 Which statements about aqueous ethanoic acid are correct? 1 It contains the functional group –COOH. 2 It reacts with carbonates to produce hydrogen. 3 It turns universal indicator paper blue. 4 It has a pH lower than pH 7. A 1 and 2 B 1 and 3 C 1 and 4 D 2 and 4

1 marks

Answer: C

This question in 0971/22 May/June 2024

31 Which statement explains why ethanoic acid is saturated? A The molecule dissociates completely in water. B There is a carbon–oxygen double bond in the molecule. C The carbon–carbon bond in the molecule is a single bond. D All the carbon–hydrogen bonds in the molecule are single bonds.

1 marks

Answer: C

This question in 0971/22 Oct/Nov 2024

33 Methanol reacts with ethanoic acid to form an ester. What is the displayed formula for this ester? A B O H O H H H C O C H H C O C C H H H H C D H O H H O H H H C C O C H H C C O C C H H H H H H

1 marks

Answer: C

This question in 0971/22 May/June 2025

35 The structure of an ester is shown. H H O H H C C C O C H H H H What is the name of this ester? A ethyl methanoate B methyl ethanoate C propyl methanoate D methyl propanoate

1 marks

Answer: D

This question in 0971/22 Oct/Nov 2025