A chemical supplier sends feedstock to a factory that makes polymers. The factory requests more alkenes, while the supplier has a surplus of long-chain alkanes. The supplier cracks some of these long-chain alkanes.
Why can using cracking help the supplier fulfil this request?
It produces larger alkanes, which the factory can use as feedstock for polymers.
It separates alkenes already mixed with the long-chain alkanes without forming new substances.
It converts the long-chain alkanes into finished polymers before they reach the factory.
It produces smaller alkenes, which the factory can use as feedstock for polymers.
91 exam-style questions on AQA GCSE Chemistry 7.1 Carbon compounds as fuels and feedstock, covering 7.1.1 Crude oil, hydrocarbons and alkanes, 7.1.2 Fractional distillation and petrochemicals, 7.1.3 Properties of hydrocarbons, and 7.1.4 Cracking and alkenes. Each one has a worked solution and a mark scheme showing where the marks go.