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CAIE A-Level Chemistry AS 14.1.4 Suggest How Cracking Can Be Used to Obtain Questions

Practise explaining why heavy crude-oil fractions are cracked, identifying suitable products and conditions, and linking lower-relative-mass alkanes and alkenes to useful…

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • explain that cracking breaks heavier crude-oil hydrocarbons into shorter-chain alkanes and alkenes with greater usefulness or demand
  • select plausible cracking products and conditions, using carbon and hydrogen conservation for lower-relative-mass products
  • connect produced alkenes with polymer manufacture and produced alkanes with fuel uses when interpreting cracking outcomes

CAIE A-Level Chemistry AS 14.1.4 Suggest How Cracking Can Be Used to Obtain Questions question 1

[Maximum number: 1]

The alkanes are a homologous series of organic molecules. Alkanes are generally unreactive and are commonly used as fuels.

Alkanes with low relative molecular mass, MrM_{\mathrm{r}}, are more useful than those found in heavier crude oil fractions.

Name the process that is used to obtain alkanes with low MrM_{\mathrm{r}} from heavier crude oil fractions.

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