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2017 O Level Chem P1 Q38 — Organic Chemistry / Reactions of Alkenes Solution

Organic Chemistry / Reactions of Alkenes 2017 O Level Pure Chemistry · Paper 1 · Q38

Question

Which row shows the products of the complete combustion of ethene and the products of the reaction of ethene with chlorine? Question diagram

Question diagram

A
B
C
D

Correct answer: A

Video Solution

Explanation

Answer: A. Complete combustion of ethene gives carbon dioxide and water. Ethene reacts with chlorine by addition across the double bond to give a single chlorine compound (1,2-dichloroethane) with no hydrogen chloride, because addition (unlike substitution) does not release HCl.

So the products are carbon dioxide and water, and a chlorine compound only.

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