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Edexcel IGCSE Chemistry 4.18 Why Cracking Is Necessary Questions

Practise cracking-need questions by linking long-chain fraction surplus to short-chain fuel demand and alkene production for polymers.

Syllabus
First assessment 2019
Course
Chemistry 4CH1

Exam points

  • Explain that surplus long-chain fractions are cracked because shorter alkanes are in higher demand.
  • Link shorter-chain alkanes to better fuels because they are more flammable than longer chains.
  • Explain that cracking also produces alkenes used to make addition polymers.

Edexcel IGCSE Chemistry 4.18 Why Cracking Is Necessary Questions question 1

[Maximum number: 2]

Crude oil is a mixture of hydrocarbons.

Catalytic cracking is used to convert long-chain alkanes into shorter-chain alkanes.

Explain why it is necessary to convert long-chain alkanes into shorter-chain alkanes.

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