Chemistry - Salt Analysis Question with Solution | TestHub

Paragraph: An aqueous solution of a mixture of two inorganic salts, when treated with dilute $HCl$ ?, gave a precipitate $(P)$ and a filtrate $(Q)$. The precipitate $P$ was found to dissolve in hot water. The filtrate $(Q)$ remained unchanged, when treated with ${\mathrm{H}}_2\mathrm{S}$ in a dilute mineral acid medium. However, it gave a precipitate $(R)$ with $H_{2}S$ in an ammoniacal medium. The precipitate $R$ gave a coloured solution $(S)$, when treated with ${\mathrm{H}}_2{\mathrm{O}}_2$ in an aqueous $\mathrm{NaOH}$ medium.