CAIE A Level Chemistry 9701 · Hydrocarbons
Ethene can be produced by the cracking of a long-chain alkane, for example hexane, and also by the dehydration of ethanol.
Compare these two methods of producing ethene. In your answer, give the reagents and conditions for each method, and state one similarity and one difference between the two reactions.
5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.
Compare means: Give similarities or differences between two things, and say which side each point belongs to. Write each point as a pair, for example: A is X, whereas B is Y. Two separate descriptions rarely earn the marks.
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