Which product is obtained on heating sodium acetate with sodalime?

$CH_3Cl \to CH_4$
Above conversion can be achieved by

Identify the product $C$ in the following reaction:
$CH_{3}CH_{2}COOH$ $\xrightarrow{NaOH} A$ $\xrightarrow{NaOH, CaO, \Delta} B$ $\xrightarrow{HNO_{3}, \Delta} C$

Which is the smallest alkane that exhibits isomerism?

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

$C.N.G$ is........