First slide

Alkanes

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

Easy

A

$CH \equiv CH$
B

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

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

${CH}_{4}$

Solution

The hydrocarbon must be alkane because it undergo free radical substitution . Ethane gives ethyl bromide which on Wurtz reaction gives n-butane(Four carbons).

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