On electrolysis an aqueous ethanolic solution of sodium chloride gives sweet smelling liquid $\left(\mathrm{A}\right)$. $\left(\mathrm{A}\right)$ gives isocyanide test and condenses with acetone to form hypotonic. What is $\left(\mathrm{A}\right)$?

Explain the following :

$\mathrm{KCN}$ reacts with $\mathrm{R}-\mathrm{I}$ to give alkyl cyanide, while $\mathrm{AgCN}$ results in isocyanide as the major product.

Explain the following :

($\mathrm{i}$) Iodoform gives precipitate with ${\mathrm{AgNO}}_3$ on heating while ${\mathrm{CHCl}}_3$ does not.

Explain the following:

Hydrogen atom of chloroform is definitely acidic, but that of methane is not.

Explain the following:

($\mathrm{i}$)$\text{ A}$ small amount of alcohol is added to chloroform bottles

Explain the following:

${\mathrm{CH}}_3-{\mathrm{CH}}_2\mathrm{I}$ reacts more rapidly with strong base in comparison to ${\mathrm{CD}}_3{\mathrm{CH}}_2$$\mathrm{I}$.

Complete the following by providing $\left(\mathrm{A}\right)$, $\left(\mathrm{B}\right)$ and $\left(\mathrm{C}\right)$:

 ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CH}={\mathrm{CH}}_2$ $\frac{\mathrm{NBS}}{\text{ Light }}\left(\mathrm{A}\right)\stackrel{\mathrm{Alc}.\mathrm{KOH}}{⟶}\left(\mathrm{B}\right)\stackrel{\mathrm{HBr}}{⟶}\left(\mathrm{C}\right)$

Complete the following by providing $\left(\mathrm{A}\right), \left(\mathrm{B}\right)$ and $\left(\mathrm{C}\right)$:

${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{MgBr}\stackrel{{\mathrm{CH}}_3\mathrm{CHO}/{\mathrm{H}}_3{\mathrm{O}}^{+}}{⟶}\left(\mathrm{A}\right)\stackrel{\mathrm{HBr}}{⟶}\left(\mathrm{B}\right)$ $\stackrel{\mathrm{Alc}·\mathrm{KOH}}{⟶}\left(\mathrm{C}\right)$