Edexcel A-Level Chemistry AS 5.7 The Addition Polymerisation of Alkenes and Draw the Repeat Unit Given the Monomer and Vice Versa Questions

Practise marked Edexcel IAL Chemistry questions on alkene monomers, polymer repeat units, extension bonds, balanced equations and reverse monomer deduction.

Exam points

Draw repeat units with brackets, extension bonds and n from named alkene monomers.
Identify the alkene monomer by restoring the C=C bond across the polymer repeat unit.
Write balanced addition polymerisation equations for alkene monomers.

[Maximum number: 3]

This question is about alkenes.

(a)

The repeat unit of the polymer polyisoprene is shown.

Figure for Question (a) — Edexcel A-Level Chemistry AS

polyisoprene

[ 3 ]

(i)

Draw the skeletal formula of the monomer of polyisoprene.

[ 1 ]

(ii)

A sample of polyisoprene has a relative molecular mass of 50250 . Calculate the number of repeat units in the sample.

[ 2 ]

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Edexcel A-Level Chemistry AS 5.7 The Addition Polymerisation of Alkenes and Draw the Repeat Unit Given the Monomer and Vice Versa Questions question 1

Question (a)

Question (i)

Question (ii)