A salt on reacting with dil. $\mathrm{H}_{2} \mathrm{SO}_{4}$ gives a reddish brown gas. The salt is

Question

A salt on reacting with dil. $\mathrm{H}_{2} \mathrm{SO}_{4}$ gives a reddish brown gas. The salt is\

Professor PC Thomas Classes · Answer

(a) : $2 \mathrm{KNO}_{2}+\mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow \mathrm{~K}_{2} \mathrm{SO}_{4}+\mathrm{HNO}_{2}$\ $3	ext{HNO}_2 \longrightarrow 	ext{HNO}_3 + 	ext{H}_2	ext{O} + 2	ext{NO}$ \ $2	ext{NO} + 	ext{O}_2 	ext{ (air)} \longrightarrow \underset{	ext{Reddish brown}}{2	ext{NO}_2\uparrow}$