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CAIE A-Level Chemistry 14.1.1 Preparation of Alkanes

Practise preparing alkanes by catalytic hydrogenation of alkenes and by cracking longer-chain alkanes.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • convert C=C to C–C using H2 with a nickel or platinum catalyst and heat
  • crack a longer alkane by heating over Al2O3 to form a shorter alkane plus one or more alkenes
  • balance cracking equations by conserving carbon and hydrogen rather than assuming fixed products

14.1.1—Preparation of alkanes question 1

[Maximum number: 1]

Different hydrocarbon mixtures produced from fractional distillation of crude oil have different uses.

State the compound that is heated with long-chain hydrocarbons to produce more useful smaller alkanes and alkenes.

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