MCQ
When a salt is treated with sodium hydroxide solution it gives gas X . On passing gas X through reagent Y a brown coloured precipitate is formed. X and Y respectively, are
- A$\mathrm{X}=\mathrm{NH}_{3}$ and $\mathrm{Y}=\mathrm{HgO}$
- B$\mathrm{X}=\mathrm{NH}_{3}$ and $\mathrm{Y}=\mathrm{K}_{2} \mathrm{HgI}_{4}+\mathrm{KOH}$
- C$\mathrm{X}=\mathrm{NH}_{4} \mathrm{Cl}$ and $\mathrm{Y}=\mathrm{KOH}$
- D$\mathrm{X}=\mathrm{HCl}$ and $\mathrm{Y}=\mathrm{NH}_{4} \mathrm{Cl}$
