1. Cracking is the thermal decomposition of alkanes into smaller hydrocarbons and possibly hydrogen.

i) State two conditions required for the cracking of an alkane.

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ii) One type of cracking produces an alkane and an alkene.

Complete an equation for the cracking of heptane into an alkane and an alkene.

C₇H₁₆ → ................ + ................ 

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iii) Complete an equation for the cracking of heptane into hydrogen and two other products.

C₇H₁₆  →................ + ................ + H₂

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iv) Suggest one reason why cracking is important.

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