Embibe Experts Solutions for Chapter: Amines, Exercise 3: EXERCISE-II (Previous Year Questions)

The number of structural isomers possible from the molecular formula ${\mathrm{C}}_3{\mathrm{H}}_9\mathrm{N}$ is ______.

Methyl amine reacts with acetyl chloride and forms 

Identify $\mathrm{B},\mathrm{X}$ and $\mathrm{R}$ Respectively in the following sequence of reactions

${\mathrm{CH}}_3\mathrm{MgBr} \stackrel{{\mathrm{CH}}_3\mathrm{CN}}{⟶}\mathrm{A}\stackrel{{\mathrm{H}}_3{\mathrm{O}}^{+}}{⟶}\boxed{\mathrm{B}}$
${\mathrm{CH}}_3{\mathrm{COCH}}_3\underset{\mathrm{NaOH}}{\overset{{\mathrm{I}}_2}{\to }}\boxed{\mathrm{X}}\stackrel{\mathrm{Ag}}{⟶}\mathrm{Y}$

${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NH}}_2\underset{0-5°\mathrm{C}}{\overset{{\mathrm{NaNO}}_2/\mathrm{HCl}}{\to }}\mathrm{P}\stackrel{\mathrm{CuCN}}{\to }\mathrm{Q}\underset{\mathrm{EtOH}}{\overset{\mathrm{Na}}{\to }}\boxed{\mathrm{R}}$

Using $\mathrm{Fe}/\mathrm{HCl}$, which one of the following reaction is possible [Here $\varphi ={\mathrm{C}}_6{\mathrm{H}}_5$]

An aromatic compound A on treatment with $\mathrm{Zn}/{\mathrm{NH}}_4\mathrm{Cl}$, and subsequent filtration in ammonical silver nitrate solution gives a black precipitate. Hence compound $\mathrm{A}$bears the group :

Assertion (A): Acetamide one reaction with ${\mathrm{Br}}_2/\mathrm{NaOH}$ give ${\mathrm{CH}}_3-{\mathrm{NH}}_2$.

Reason (R): Carbon of amide functional group becomes part of ${\mathrm{Na}}_2{\mathrm{CO}}_3$.

Assertion (A): Diazonium salt is prepared at low temperature.

Reason (R): Diazonium salt is hydrolysed to give phenol.

Assertion (A): Carbylamine reaction involves reaction between $1°$ amine and chloroform in basic medium to give isocyanide.

Reason (R): Methylene $\left(:{\mathrm{CH}}_2\right)$ carbene is formed as a reaction intermediate.