Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to gaseous hydrocarbon containing less than four carbon atoms. (A) is [2018]

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Solution

Q.
Hydrocarbon (A) reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to gaseous hydrocarbon containing less than four carbon atoms. (A) is [2018]

1 $CH \equiv CH$

2 ${CH}_{2} = {CH}_{2}$

3 ${CH}_{3} - {CH}_{3}$

4 ${CH}_{4}$

Ans.
(4)

$\underset{(A)}{{CH}_{4}} \overset{{Br}_{2} / hv}{\to} {CH}_{3} Br \overset{Na / dry ether Wurtz reaction}{\to} \underset{(Less than 4 carbon atoms)}{{CH}_{3} - {CH}_{3}}$

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