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

Choose the correct order of basicity of the following compounds in the aqueous phase:
$(A)$ $(C_2H_5)_2NH$
$(B)$ $C_2H_5NH_2$
$(C)$ $NH_3$
$(D)$ $C_6H_5NH_2$

The major product in the following reaction is:

Which of the following has the maximum nucleophilicity?

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.

Which of the following reactions does $NOT$ involve the replacement of the diazonium group?