Question detail
Which statement best describes the key feature of a condensation polymerisation reaction?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Reactions of alkenes and alcohols (chemistry only)
Question
- A. A new molecule is formed and a small molecule such as water is released
- B. The monomers join without loss of any atoms
- C. The reaction requires a catalyst to proceed
- D. The polymer contains a repeating unit that is different from the monomer
Answer
The correct option is A new molecule is formed and a small molecule such as water is released.
Explanation
The correct option is A new molecule is formed and a small molecule such as water is released. A new molecule is formed and a small molecule such as water is released 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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