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7.1 Carbon compounds as fuels and feedstock

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Question 12

An engineer tests two liquid hydrocarbon fuels in a burner. The fuels are at the same temperature.

FuelMolecular formula
PC6H14\text{C}_6\text{H}_{14}C6​H14​
QC12H26\text{C}_{12}\text{H}_{26}C12​H26​
a.

State which fuel has the larger molecules.

[1]
b.

State which fuel:

  • flows more easily through the burner pipe
  • ignites more easily.
[2]
c.

Fuel P undergoes complete combustion in a plentiful supply of oxygen.

Name the two products formed.

[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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