Question

Nitrogen reacts with a metal $M$ to produce a compound $X$. This compound $X$, when dissolved in water forms pungent gas $Y$ which can be identified easily by the formation of white fumes in the presence of $HCl$.

Identify $Y$.

• A. Nitrogen dioxide
• B. Ammonia
• C. Nitrous oxide
• D. Nitric oxide

Answer 1

Answer: (B)

Ammonia

Calcium metal reacts with nitrogen to form calcium nitride.
Metal $M$ is calcium.

$3\underset{M}{Ca}+N_2\to C{a}_3{N}_2.$

The calcium nitride reacts with water to form $N{H}_3$, which will react with HCl to give white fumes.

Thus, $Y$ is $N{H}_3$.