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7.1 Carbon compounds as fuels and feedstock

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Question 19

The equation shows a cracking reaction. Hydrocarbon X has the formula CxHy\text{C}_{x}\text{H}_{y}Cx​Hy​.

C13H28→C7H16+2CxHy\text{C}_{13}\text{H}_{28} \rightarrow \text{C}_{7}\text{H}_{16} + 2\text{C}_{x}\text{H}_{y}C13​H28​→C7​H16​+2Cx​Hy​

a.

Calculate the values of x x\,x and yyy.

[2]
b.

Hydrocarbon X is shaken with bromine water.

Explain the observation expected.

[2]
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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