Which of the following is $NOT$ obtained when a mixture of methyl bromide and ethyl bromide is treated with sodium metal in the presence of dry ether?

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

Consider the given sequence of reactions.
$C_2H_6 + \frac{3}{2}O_2$ $\xrightarrow[\Delta]{(CH_3COO)_2Mn} X$ $\xrightarrow{NaOH} Y$
Electrolysis of aqueous solution of $Y$ gives gases $P$ and $Q$ at anode. $P$ and $Q$ are respectively.

At room temperature,solid paraffin is:

What is an alkane substitution reaction? Give the names and possibilities of different types of substitution reactions.

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 '$n$'?