How many of the following reagents react with arene diazonium salts to form aryl halides?
$\mathrm{i}.$ $\mathrm{H}\mathrm{B}{\mathrm{F}}_4/\mathrm{\Delta }$
$\mathrm{i}\mathrm{i}.$ $\mathrm{K}\mathrm{H}\mathrm{S}$
$\mathrm{i}\mathrm{i}\mathrm{i}.$ $\mathrm{C}\mathrm{u}\mathrm{C}\mathrm{N}/\mathrm{K}\mathrm{C}\mathrm{N}$
$\mathrm{i}\mathrm{v}.$ $\mathrm{C}\mathrm{u}\mathrm{B}\mathrm{r}/\mathrm{H}\mathrm{B}\mathrm{r}$
$\mathrm{v}.$ $\mathrm{C}\mathrm{u}/\mathrm{H}\mathrm{C}\mathrm{l}$
$\mathrm{v}\mathrm{i}.$ $\mathrm{K}\mathrm{I}/\mathrm{\Delta }$
$\mathrm{v}\mathrm{i}\mathrm{i}.$ $\mathrm{C}{\mathrm{H}}_3\mathrm{C}{\mathrm{H}}_2\mathrm{O}\mathrm{H}$
$\mathrm{viii}\mathrm{.}\mathrm{\hspace{0.33em}}{\mathrm{H}}_3{\mathrm{PO}}_2{\mathrm{/H}}_2\mathrm{O}$

How many of the following will give positive carbylamine test?

Howmany of the following reactions will give a primary amine?

$\left(\mathrm{i}\right) {\mathrm{CH}}_3{\mathrm{CONH}}_2\stackrel{{\mathrm{Br}}_2, \mathrm{KOH}}{⟶}$

$\left(\mathrm{ii}\right) {\mathrm{CH}}_3\mathrm{CN}\stackrel{{\mathrm{LiAlH}}_4}{\to }$

$\left(\mathrm{iii}\right) {\mathrm{CH}}_3\mathrm{NC}\stackrel{ {\mathrm{LiAlH}}_4}{⟶}$

$\left(\mathrm{iv}\right) {\mathrm{CH}}_3{\mathrm{CONH}}_2\stackrel{{\mathrm{LiAlH}}_4}{\to }$

, (major product) $\mathrm{X}$ will be:

In the following reaction sequence, the compounds $\left(\mathrm{X}\right)$ and $\left(\mathrm{Y}\right)$, respectively are

In the reaction, the product $\left(\mathrm{C}\right)$ is ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NH}}_2\underset{0-5°\mathrm{C}}{\overset{{\mathrm{NaNO}}_2+\mathrm{HCl}}{\to }}\left(\mathrm{A}\right)\underset{\mathrm{KCN}}{\overset{\mathrm{CuCN}}{\to }}\left(\mathrm{B}\right)\stackrel{{\mathrm{H}}^{+}/{\mathrm{H}}_2\mathrm{O}}{⟶}\left(\mathrm{C}\right)$

The major products $\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$ in the following sequence of transformations

 are: