Chemistry - Complete P-block Question with Solution | TestHub

In the given sequence, ${\left(N{H}_4\right)}_{2}S{O}_4$ reacts with $NaO{H}_{}$ to produce ammonia gas $N{H}_3$.

When excess $N{H}_3$ reacts with $C{l}_2$, it forms nitrogen gas $R\left(N_2\right)$ and $N{H}_{4}Cl$.

(A) is correct; $N{H}_3$ has a trigonal pyramidal shape due to its lone pair.

(B) is generally considered incorrect for Sodium (unlike Lithium, Sodium does not easily form nitrides by direct heating with $N_2$).

(C) is correct; aqueous $N{H}_3$ provides $O{H}^{-}$ ions that precipitate brown hydrated ferric oxide from $FeC{l}_3$.

(D) is correct; $N{H}_3$ dissolves $AgCl$ by forming the soluble complex $[Ag(N{H}_3{)}_2]Cl$.

$$AgCl+2N{H}_3\to [Ag(N{H}_3{)}_2]Cl$$