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 green precipitate (R) in an ammoniacal medical. The precipitate (R) gave a coloured solution (S), when treated with `H_(2)O_(2)` in an aqueous NaOH medium. Answer Question 62 and 63 The coloured solution (S) containsA. `Fe(SO_(4))_(3)`B. `CuSO_(4)`C. `ZnSO_(4)`D. `Na_(2)CrO_(4)`

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

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 `H_(2)S` in a dilute mineral acid medium. However, it gave a green precipitate (R) in an ammoniacal medical. The precipitate (R) gave a coloured solution (S), when treated with `H_(2)O_(2)` in an aqueous NaOH medium. Answer Question 62 and 63 The coloured solution (S) containsA. `Fe(SO_(4))_(3)`B. `CuSO_(4)`C. `ZnSO_(4)`D. `Na_(2)CrO_(4)`
Answer» Correct Answer - D<br>The coloured solution (S) is `Na_(2)CrO_(4)`<br> The available data suggests that the mixture contains `Pb^(2+)` and `Cr^(3+)` ions. The series of reactions involved are :<br>