$CH_{3}CH_{2}Br$ $\xrightarrow[\Delta]{aq. KOH} A$ $\xrightarrow[\Delta]{KMnO_{4} / H^{+}} B$ $\xrightarrow[\Delta]{NH_{3}} C$ $\xrightarrow[alkali]{Br_{2}} D$. '$D$' is

Assertion : Nitration of aniline can be conveniently done by protecting the amino group by acetylation.
Reason : Acetylation increases the electron density in the benzene ring.

Which of the following compounds reacts with $HNO_2$ to form an alcohol?

Reduction of nitroalkanes in neutral medium (e.g.,$Zn / NH_4Cl$) forms mainly

Which of the following products is obtained upon the hydrolysis of a primary amine?

Account for the following:
$(i)$ $pK_{b}$ of aniline is more than that of methylamine.
$(ii)$ Ethylamine is soluble in water whereas aniline is not.
$(iii)$ Methylamine in water reacts with ferric chloride to precipitate hydrated ferric oxide.
$(iv)$ Although amino group is $o-$ and $p-$ directing in aromatic electrophilic substitution reactions,aniline on nitration gives a substantial amount of $m$-nitroaniline.
$(v)$ Aniline does not undergo Friedel-Crafts reaction.
$(vi)$ Diazonium salts of aromatic amines are more stable than those of aliphatic amines.
$(vii)$ Gabriel phthalimide synthesis is preferred for synthesising primary amines.