Aniline reacts with acetaldehyde to form

Assertion $(A)$: $-NH_2$ group of aniline is ortho,para directing in electrophilic substitutions.
Reason $(R)$: $-NH_2$ group stabilises the arenium ion formed by the ortho,para attack of the electrophile.
The correct answer is

Tertiary amines have the lowest boiling points among isomeric amines because,

$Methyl$ amine on reaction with chlorine in the presence of $NaOH$ gives:

The compound $X$ in the following reaction scheme is:

$A$ compound $(x)$ with molar mass $108 \ g \ mol^{-1}$ undergoes acetylation to give a product with molar mass $192 \ g \ mol^{-1}$. The number of amino groups in the compound $(x)$ is . . . . . .