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6.2 Organic chemistry

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Question 32

A chemical plant uses four compounds as feedstocks. Each compound belongs to the alkane, alkene or alcohol homologous series.

CompoundFormula
PC2H4\mathrm{C_2H_4}C2​H4​
QC3H6\mathrm{C_3H_6}C3​H6​
RC3H8\mathrm{C_3H_8}C3​H8​
SC2H5OH\mathrm{C_2H_5OH}C2​H5​OH

When compound P is shaken with bromine water, the colour of the bromine water changes.

a.

Which other compound is a member of the same homologous series as compound P? Explain your answer.

[3]
b.

State the colour change expected when compound Q is shaken with bromine water. Explain your answer.

[2]
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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