In the given compounds,which has the highest boiling point $:-$

Match the column $I$ with column $II$ to identify the products of oxidation of alkanes and mark the appropriate choice.

Column $I$	Column $II$
$A$. $(CH_3)_3CH + O_2 \xrightarrow{KMnO_4} (CH_3)_3COH$	$i$. $CH_3COOH + H_2O$
$B$. $2CH_4 + O_2 \xrightarrow[100 \ atm]{Cu/523 \ K} 2CH_3OH$
$C$. $CH_4 + O_2 \xrightarrow[\Delta]{Mo_2O_3} HCHO + H_2O$	$iii$. $2CH_3OH$
$D$. $CH_3-CH_3 + \frac{3}{2}O_2 \xrightarrow{(CH_3COO)_2Mn} CH_3COOH + H_2O$	$iv$. $HCHO + H_2O$

Which is the smallest alkane that exhibits isomerism?

An alkane forms isomers if the number of carbon atoms is at least

Complete the following reactions:
$(1)$ $CH_3CH_2CH_2CH_2Cl + H_2 \xrightarrow{Zn, H^{+}}$
$(2)$ $CH_3CH_2CH_2CH_3 \xrightarrow[HCl, \Delta]{Anhy. AlCl_3}$

Identify $X$ and $Y$ in the following reactions:
$CH_4 + O_2 \xrightarrow{Mo_2O_3 / \Delta} X$
$2CH_4 + O_2 \xrightarrow{Cu / 523 \ K / 100 \ atm} 2Y$