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 H2S in a dilute mineral acid medium. However, it gave a precipitate with H2S in an ammonical medium. The precipitate R gave a coloured solution (S), when treated with H2O2 in an aqueous NaOH medium. The precipitate P contains:

An aqueous solution of a mixture of two inorganic salts, when treated

1.	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 H2S in a dilute mineral acid medium. However, it gave a precipitate with H2S in an ammonical medium. The precipitate R gave a coloured solution (S), when treated with H2O2 in an aqueous NaOH medium. The precipitate P contains:
Answer» 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 $H_{2}$ S in a dilute mineral acid medium. However, it gave a precipitate with $H_{2}$ S in an ammonical medium. The precipitate R gave a coloured solution (S), when treated with $H_{2} O_{2}$ in an aqueous NaOH medium. The precipitate P contains: