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7.1 Carbon compounds as fuels and feedstock

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Question 3

A gas sample collected after cracking may contain alkanes and alkenes. Bromine water is orange before it is added to the sample. Which observation would show that an alkene is present?

Select one answer.

[1]
A

The bromine water changes from orange to colourless

B

The bromine water changes from orange to pale yellow

C

The bromine water remains orange

D

The bromine water changes from orange to red

Markscheme

7.1 Carbon compounds as fuels and feedstock Questions

  1. GCSE
  2. /Chemistry
  3. /7.1 Carbon compounds as fuels and feedstock

91 exam-style questions on AQA GCSE Chemistry 7.1 Carbon compounds as fuels and feedstock, covering 7.1.1 Crude oil, hydrocarbons and alkanes, 7.1.2 Fractional distillation and petrochemicals, 7.1.3 Properties of hydrocarbons, and 7.1.4 Cracking and alkenes. Each one has a worked solution and a mark scheme showing where the marks go.

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