Which of the following is $NOT$ obtained when a mixture of methyl chloride and $n-$propyl chloride is treated with sodium metal in dry ether?

Compound $A$ undergoes the following sequence of reactions to give compound $B$. The correct structure and chirality of compound $B$ is:
[where $Et$ is $-C_2H_5$]

Which one of the following compounds gives methane on treatment with water?

In the synthesis of sodium lauryl sulphate,lauryl alcohol is treated with $H_2SO_4$ to form lauryl hydrogen sulphate,which is then neutralized with $NaOH$. The structure of lauryl alcohol is $CH_3(CH_2)_nCH_2OH$. What is the value of '$n$'?

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

Identify the product $A$ in the following reaction:
$C_6H_{11}CH_2Br \xrightarrow{Na, \text{Dry ether}} A$