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6.2 Organic chemistry

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Question 26
H

A polyester is made from ethane-1,2-diol, HO−CH2CH2−OH\mathrm{HO{-}CH_{2}CH_{2}{-}OH}HO−CH2​CH2​−OH, and benzene-1,4-dicarboxylic acid, HOOC−C6H4−COOH\mathrm{HOOC{-}C_{6}H_{4}{-}COOH}HOOC−C6​H4​−COOH.

Each repeating unit of the polyester is made from one molecule of each monomer.

Relative atomic mass (ArA_rAr​): H = 1.0 C = 12.0 O = 16.0

What is the relative formula mass of one repeating unit?

[1]
A

174

B

192

C

210

D

228

Markscheme

6.2 Organic chemistry Questions

  1. GCSE
  2. /Chemistry
  3. /6.2 Organic chemistry

63 exam-style questions on OCR GCSE Chemistry 6.2 Organic chemistry, covering 6.2.1 Crude oil and fractional distillation, 6.2.2 Cracking and dependence on hydrocarbons, 6.2.3 Functional groups and homologous series, 6.2.4 Reactions of alkanes, alkenes and alcohols, 6.2.5 Addition polymerisation and repeat units, 6.2.6 Naturally occurring polymers, 6.2.7 Chemical cells and fuel cells, and 6.2.8 Condensation polymerisation and how to make one. Each one has a worked solution and a mark scheme showing where the marks go.

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