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CAIE IGCSE Chemistry 11.7 Carboxylic Acids Questions

Practise recognising carboxylic-acid structures and reactions with metals, bases and carbonates, as well as oxidation routes and ester formation.

Syllabus
2026–2028
Course
Chemistry 0620

Exam points

  • identify the carboxyl group and apply the general formula when naming or drawing an acid
  • predict salt-forming reactions with metals, bases and carbonates, including gas observations
  • form an ester from a named carboxylic acid and alcohol and draw the ester linkage

Covered syllabus points

11.7.1—Reaction of ethanoic acid11.7.2—Formation of ethanoic acid by the11.7.3—Reaction of a carboxylic acid with an

Question 1

[Maximum number: 1]

Which statement about aqueous ethanoic acid is correct?

A

It reacts with magnesium to produce a salt and hydrogen.

B

It reacts with sodium hydroxide to produce a salt and hydrogen.

C

It reacts with ammonium salts to produce ammonia.

D

It turns red litmus blue.

Question 2

[Maximum number: 1]

Which type of reaction occurs when ethanol is converted to ethanoic acid?

A

combustion

B

decomposition

C

neutralisation

D

oxidation

Question 3

[Maximum number: 2]

Many organic compounds contain carbon and hydrogen only.

Carboxylic acids and esters contain carbon, hydrogen and oxygen only.

An ester X and a carboxylic acid Y both contain 3 carbon atoms.
X and Y have the same molecular formula.

Esters are made by the reaction between carboxylic acids and alcohols.

Ester X is methyl ethanoate.
Name the carboxylic acid and the alcohol used to make methyl ethanoate.
carboxylic acid
alcohol

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