A carboxylic acid $\mathrm{A}\left({\mathrm{C}}_4{\mathrm{H}}_{10}{\mathrm{O}}_2\right)$ when heated with hydrazoic acid in the presence of conc. ${\mathrm{H}}_2{\mathrm{SO}}_4$, gives a compound $\mathrm{B}$, which on treatment with alkaline chloroform forms another compound $\mathrm{C}.$ Compound $\mathrm{C}$ gives the following reactions.
(i) On hydrolysis in presence of acid, it gives compound $\mathrm{B}$ and methanoic acid.

(ii) On reduction it gives $\mathrm{iso}-$propylmethylamine.

Identify compound $\mathrm{A}$ and give all the reactions.

The major product of the following reaction is:

The major product 'X' formed in the following reaction is:

The major product of the following reaction is:

Mention the reagents used for the following conversions:

(m) ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_3\stackrel{\mathrm{A}}{\to }{\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CHO}$

(n) ${\mathrm{CH}}_3\mathrm{CHO}\stackrel{\mathrm{B}}{\to }{\mathrm{CH}}_3{\mathrm{COOC}}_2{\mathrm{H}}_5$

(o) ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CHO}\stackrel{\mathrm{C}}{\to }{\mathrm{C}}_6{\mathrm{H}}_5\mathrm{COCH}\left(\mathrm{OH}\right){\mathrm{C}}_6{\mathrm{H}}_5$

(p) ${\mathrm{CH}}_3{\mathrm{COCH}}_3\stackrel{\mathrm{D}}{\to }{\left({\mathrm{CH}}_3\right)}_2\mathrm{C}\left(\mathrm{OH}\right){\mathrm{CH}}_2{\mathrm{COCH}}_3$

(q) ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{COOH}\stackrel{\mathrm{E}}{\to }{\mathrm{CH}}_3\mathrm{CH}\left(\mathrm{Br}\right)\mathrm{COOH}$

(r) ${\mathrm{CH}}_3{\mathrm{COCH}}_3\stackrel{\mathrm{F}}{\to }{\mathrm{CH}}_3{\mathrm{COCH}}_2\mathrm{Br}$

In the following reactions, products $\mathrm{A}$ and $\mathrm{B}$ are:

The major product formed in the following reaction is:

Compound $\mathrm{\prime }\mathrm{x}\mathrm{\prime }$ is:

The major product of the following reaction is:

The major product obtained in the following reaction is:

Reagent(s) which can be used to bring about the following transformation is(are)