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WAEC Chemistry 2021 Theory — Question 12

Question 12 of 31 from the West African Examinations Council (WAEC) Chemistry 2021 Theory paper, with the correct answer and a full explanation.

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2(a)(ii). Explain briefly why there are differences in the reaction of ethene and ethane.

Model answer

Ethane is a saturated hydrocarbon (single C-C bond) and mainly undergoes substitution reactions, while ethene is unsaturated (contains a C=C double bond) and therefore mainly undergoes addition reactions.

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