Addition polymerisation
2 marks · HardA student is given the displayed formula for the repeat unit of a polymer:
Deduce the structural formula of the monomer, and write its name.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
(a) · must show Double bond between first and second carbon
(b) Propene · must show Correct name: propene
Common mistakes: Writing formula of the repeat unit, not the monomer; Leaving out double bond in monomer
Show mark scheme and worked solution
Marking points
B1 · 1 mark · Gives correct structural or molecular formula for the monomer ()
B2 · 1 mark · Gives correct name: propene
Worked solution
a) Looking at the repeat unit structure, it comes from a monomer with three carbons, a double bond, and one methyl side group: .
b) The name is propene.