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7.1 Carbon compounds as fuels and feedstock

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Question 11

Temperature measurements were taken at two outlets in a fractionating column. A hydrocarbon has a boiling point of 90 °C.

Outlet positionTemperature / °C
Lower outlet170
Outlet near the top75

Explain why this hydrocarbon is collected at the outlet near the top rather than at the lower outlet.

[2]
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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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