Question Constellation Sign up for free AQA · GCSE · Chemistry · Higher
Polymer formation displayed equation
Many molecules of compound A join together to form polymer B.
Complete the displayed formula equation which represents this reaction.
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Marking points
- 1 Draws a single bond between the two backbone carbon atoms inside the polymer bracket.
- 2 Writes n after the bracketed repeating unit.
Why this answer loses marks
The student leaves a double bond in the polymer backbone and omits the repeat notation.
Addition polymerisation opens the alkene bond, and the completed repeating unit must be marked as repeating.