Chloroethene, CH2=CHCl\mathrm{CH_{2}=CHCl}CH2=CHCl, forms the addition polymer poly(chloroethene).
(relative atomic masses: C = 12, H = 1, Cl = 35.5)
Statement 1: chloroethene and poly(chloroethene) have the same percentage by mass of chlorine
Statement 2: poly(chloroethene) decolourises bromine water, because its monomer contains a C=C bond
Statement 3: a chain made from 2000 chloroethene molecules has a relative formula mass of about 125 000
Which statements are correct?
1 only
2 and 3 only
1 and 2 only
1 and 3 only
37 exam-style questions on Edexcel GCSE Chemistry 10.3 Polymers, covering 10.3.1 Addition polymerisation of alkenes, 10.3.2 Uses and properties of polymers, 10.3.3 Condensation polymers and polyesters, 10.3.4 Problems with polymers and recycling, and 10.3.5 Natural polymers: DNA, starch and proteins. Each one has a worked solution and a mark scheme showing where the marks go.