Carboxylic acids

Which structure shows a compound that dissolves in water to produce an acidic solution?

Feb/March 2016

Citric acid occurs in lemon juice, and it displays the usual properties of an acid.

Feb/March 2016

A compound has the formula $\text{CH}_3\text{COOH}$. Which of the following is not a property of this compound?

Feb/March 2018

Which substances combine to produce ethyl propanoate?

Feb/March 2018

The structure of a compound, G, is illustrated. G belongs to the same homologous series as ethanoic acid. Which row gives some of the properties of an aqueous solution of G?

Feb/March 2019

The topic of this question is ethanoic acid, $\text{CH}_3\text{COOH}$.

Feb/March 2019

Which of the statements below concerning ethanoic acid are correct?

Feb/March 2020

Ethanoic acid is a typical carboxylic acid. Which statement concerning ethanoic acid is correct?

Feb/March 2020

Angelic acid and ethanoic acid are each carboxylic acids, and the structure of angelic acid is shown here.

Feb/March 2020

Which substance is made up of long-chain molecules and forms part of food?

Feb/March 2021

When carboxylic acids are heated with alcohols in the presence of an acid catalyst, what type of substance is produced in this reaction?

Feb/March 2023

Propane, propene, propan-1-ol and propanoic acid belong to different homologous series, but each molecule contains three carbon atoms.

Feb/March 2023

Which statement concerning carboxylic acids is incorrect?

May/June 2016

An ester has the formula $\mathrm{CH}_3\mathrm{CH}_2\mathrm{CH}_2\mathrm{COOCH}_2\mathrm{CH}_2\mathrm{CH}_3$. Which acid and which alcohol combine to form this ester?

May/June 2017

Glycolic acid occurs in the stalks of sugar-cane plants. Its structure is shown.

May/June 2017

Carboxylic acids can react with alcohols to make esters, and the process is reversible. The equation for the reaction of ethanoic acid with ethanol is shown. $\text{CH}_3\text{COOH} + \text{CH}_3\text{CH}_2\text{OH} \rightleftharpoons \text{CH}_3\text{COOCH}_2\text{CH}_3 + \text{H}_2\text{O}$

May/June 2019

Some details about compound L are given below. L is an organic compound containing four hydrogen atoms. L dissolves in water. When an aqueous solution of L is added to copper(II) carbonate, a gas is produced. What is L?

May/June 2021

How is butanoic acid structured?

May/June 2021

Which of these statements about ethanoic acid are correct?

May/June 2021

The displayed structure is that of succinic acid.

May/June 2021

Which of these statements about ethanoic acid are correct?

May/June 2022

Methanoic acid reacts with propan-1-ol to produce an ester. What is the structural formula of this ester?

May/June 2023

What is the structural formula of propanoic acid?

May/June 2023

Which statement regarding ethanoic acid is correct?

May/June 2024

Propanoic acid is a carboxylic acid. Its chemical behaviour is similar to that of ethanoic acid. Which of the following statements are correct?

May/June 2024

Which displayed formula shows the ester produced when propan-1-ol reacts with ethanoic acid?

May/June 2024

Which statement concerning carboxylic acids is correct?

May/June 2024

This question concerns carboxylic acids and alkanes.

May/June 2024

Which of the following statements about ethanoic acid are correct?

May/June 2025

This equation shows the reaction of ethanoic acid with ethanol. $\text{CH}_3\text{COOH} + \text{CH}_3\text{CH}_2\text{OH} \rightleftharpoons \text{CH}_3\text{COOCH}_2\text{CH}_3 + \text{H}_2\text{O}$ What kind of reaction is shown here?

May/June 2025

Several characteristics of an organic compound, J, are given. J is liquid at room temperature. It dissolves in water. When a solution of J is added to calcium carbonate, carbon dioxide is produced. A solution of J has a pH of $3$. In which homologous series does J belong?

May/June 2025

Describe the defining properties of acids. Your response should mention how acids react with metals, bases, carbonates and indicators.

Oct/Nov 2016

The table lists the bonds found in compound X and those that are absent from compound X. Bonds shown: - C-C: present - C=C: not present - C-H: present - C-O: present - C=O: present - O-H: present What type of compound is X?

Oct/Nov 2017

Which two compounds could be used to make $\text{CH}_3\text{CH}_2\text{COOCH}_2\text{CH}_3$?

Oct/Nov 2017

The structure of an ester is displayed. Which substances combine to produce this ester?

Oct/Nov 2017

The structure of an ester is shown. Which pair of carboxylic acid and alcohol would form this ester?

Oct/Nov 2017

Which of the following statements about ethanoic acid is correct?

Oct/Nov 2018

When the alcohol $\text{CH}_3\text{CH}_2\text{CH}_2\text{OH}$ reacts with the carboxylic acid $\text{CH}_3\text{CH}_2\text{CH}_2\text{COOH}$ an ester is produced. State the name and structural formula for this ester.

Oct/Nov 2018

Which reaction may be used to produce ethanoic acid?

Oct/Nov 2018

Which statement concerning ethanoic acid is correct?

Oct/Nov 2018

The diagram of compound P is displayed.

Oct/Nov 2018

The diagram shows the structure of compound X. X is part of the same homologous series as ethanoic acid. Which row gives some of the properties of an aqueous solution of X?

Oct/Nov 2020

This question concerns alcohols, carboxylic acids and esters.

Oct/Nov 2020

What structural formula represents the ester produced from ethanoic acid and propanol?

Oct/Nov 2021

An organic compound $X$ has two carbon atoms in every molecule. When $X$ reacts with aqueous sodium carbonate, carbon dioxide is given off. What is compound $X$?

Oct/Nov 2022

The findings from tests on an organic compound are shown below. appearance: colourless liquid after adding aqueous bromine: no reaction after using a lighted splint: burns after adding litmus: turns red What is the organic compound?

Oct/Nov 2022

Which word equation shows a reaction involving ethanoic acid?

Oct/Nov 2022

What structural formula represents butanoic acid?

Oct/Nov 2023

Esters are produced when a carboxylic acid reacts with an alcohol. What catalyst is used for this reaction?

Oct/Nov 2023

A compound with the formula $\text{CH}_3\text{COOC}_2\text{H}_5$ is produced from ethanol by two different reactions. reaction 1: Ethanol is converted into ethanoic acid. reaction 2: Ethanoic acid reacts with ethanol to make $\text{CH}_3\text{COOC}_2\text{H}_5$. Which row correctly describes reaction 1 and reaction 2?

Oct/Nov 2023

On Fig. 7.1, circle one carboxylic acid functional group.

Oct/Nov 2023

What processes can be used to produce ethanoic acid?

Oct/Nov 2024

Which statement gives a property of ethanoic acid?

Oct/Nov 2025

Which statement about aqueous ethanoic acid is correct?

Oct/Nov 2025

Which of these statements about ethanoic acid is correct?

Oct/Nov 2025