Which of the following does not react with $PCl_5$?

Which of the following reactions is used to prepare hydrocarbons with an even number of carbon atoms?
$i.$ Wurtz reaction
$ii.$ Decarboxylation reaction
$iii.$ Kolbe's electrolysis
$iv.$ Reduction
$v.$ Hydrogenation

What is the chief product obtained when $n$-butane is treated with bromine in the presence of light at $130^{\circ}C$?

Excess of isobutane on reaction with $Br_{2}$ in presence of light at $125^{\circ} C$ gives which one of the following,as the major product?

Reaction of ethyl chloride with sodium leads to

The alkane which is next to methane in the homologous series can be prepared from which of the following reactions?
$I$. $2 CH_3 Br \xrightarrow[\text{dry ether}]{Na}$
$II$. $CH_3 COOH \xrightarrow[CaO, \Delta]{NaOH}$
$III$. $CH_3 CH=CH_2 \xrightarrow{H_2 / Pt}$
$IV$. $CH_3 CH_2 Br \xrightarrow[H^{+}]{Zn}$
Correct answer is