Previous Year NEET Question- Hydrocarbons L-5

Question: 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#

A) $\mathrm{CH} \equiv \mathrm{CH}$

B) $\mathrm{CH}_2=\mathrm{CH}_2$

C) $\mathrm{CH}_3-\mathrm{CH}_3$

D) $\mathrm{CH}_4$

Answer: $\mathrm{CH}_4$#

Sol:#

$\mathrm{CH}_4 \underset{h v}{\stackrel{\mathrm{Br}_2}{\longrightarrow}} \mathrm{CH}_3-\mathrm{Br} \underset{\text { ether }}{\stackrel{\mathrm{Na}}{\longrightarrow}} \mathrm{CH}_3-\mathrm{CH}_3$