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6.2 Organic chemistry

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Question 26

An alkene, M, has the formula CH2=CH(CH2)5CH3\mathrm{CH_2{=}CH(CH_2)_5CH_3}CH2​=CH(CH2​)5​CH3​.

M undergoes addition polymerisation. One polymer molecule is formed from 12 500 molecules of M.

AtomRelative atomic mass
C12
H1
a.

Calculate the relative formula mass of the polymer molecule.

[2]
b.

The same volume of bromine water is shaken separately with M and with the polymer.

Describe and explain what is observed in each test.

[4]
Markscheme

6.2 Organic chemistry Questions

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

131 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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