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Crude oil is a finite resource. Petrol and other fuels are produced from it using fractional distillation. Cracking is used to convert long alkanes into shorter, more useful hydrocarbons.

Alkanes, alkenes, alcohols and carboxylic acids are different homologous series of organic compounds. Naturally occurring and synthetic polymers can be formed from a variety of monomers.

Understanding how to approach exam questions helps to boost exam performance. Question types will include multiple-choice, structured, mathematical and practical questions.