Question detail

In a condensation polymerisation between two monomers each containing a carboxyl group and an alcohol group, what is the repeating unit of the resulting polymer?

Try the question, check the answer, then read the explanation to understand the curriculum point.

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At a glance

MCQ

Type

practice

Style

Topic

Reactions of alkenes and alcohols (chemistry only)

Question

A. C–O–C–O–C
B. C–O–C–O–C–O–C
C. C–O–C–O–C–O–C–O–C
D. C–O–C–O–C–O–C–O–C–O–C

Answer

The correct option is C–O–C–O–C.

Explanation

The correct option is C–O–C–O–C. C–O–C–O–C is correct because it directly supports the approved learning objective to explain the basic principles of condensation polymerisation by reference to the functional groups in the monomers and the repeating units in the polymers. (HT only). This belongs to Polymerisation and naturally occurring polymers within Reactions of alkenes and alcohols (chemistry only), so the answer must use the correct organic chemistry context. The other options are incorrect when they confuse the organic family, formula type, reaction condition, product, or property being tested. Keep molecular formula, structural formula, displayed formula, and general formula distinct. Do not confuse alkanes with alkenes, saturated with unsaturated, cracking with combustion, polymers with monomers, or hydrocarbons with oxygen-containing alcohols and carboxylic acids. When formulae are used, preserve the stored notation exactly and explain the GCSE chemistry idea in words rather than using unsupported displayed-formula diagrams.

Common mistake

Confusing Condensation with Addition Polymerisation

Students often confuse condensation polymerisation with addition polymerisation, thinking that both processes involve the same type of reaction.

To fix this, remember that condensation polymerisation involves monomers with two functional groups and results in the loss of small molecules like water, while addition polymerisation involves monomers with a double bond and does not produce any small molecules.

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