Question

A solution of colourless unknown salt (X) on boiling with excess of NaOH produces non-flammable gas. The gas evolution ceases after some time. Upon addition of Zn dust to the same solution, the gas evolution restarts. The colourless salt (X) is (are)

• (A) NH4NO3
• (B) (NH4)2SO4
• (C) NH4NO2
• (D) NH4Cl

Answer 1

The Correct Option is B, D

Explanation:
${\mathrm{NH}}_4\mathrm{X}+\mathrm{NaOH}\to \mathrm{NaX}+{\mathrm{H}}_2\mathrm{O}+{\mathrm{NH}}_3\uparrow$$(\mathrm{X}={\mathrm{NO}}_3^{-},{\mathrm{NO}}_2^{-},{\mathrm{Cl}}^{-},{\mathrm{SO}}_4^{2-})$