An aqueoussolution of amixture of two inorganic salt , when reated with diute HCI ,Gave a precipitate (P) and a filrate (Q) .Theprecipitate Pwasfound todissolve in hot water .The filrate (Q)remained unchanged , whitetracatedwith H_(2)S in a difute mineralacid medium.However itgave a precipitate (R ) with H_(2)Sin an ammoniacalmedium.THeprecipitate R give acolouredsolution (S ) when treated with H_(2)O_(2) to an aq2ueousNaOHmedium The coloured solution S contain

An aqueoussolution of amixture of two inorganic salt , when reated wit

1.	An aqueoussolution of amixture of two inorganic salt , when reated with diute HCI ,Gave a precipitate (P) and a filrate (Q) .Theprecipitate Pwasfound todissolve in hot water .The filrate (Q)remained unchanged , whitetracatedwith H_(2)S in a difute mineralacid medium.However itgave a precipitate (R ) with H_(2)Sin an ammoniacalmedium.THeprecipitate R give acolouredsolution (S ) when treated with H_(2)O_(2) to an aq2ueousNaOHmedium The coloured solution S contain
Answer» `Fe_(2)(SO_(4))_(3)` `CuSO_(4)` `ZnSO_(4)` `Na_(2)CrO_(4)` Solution :The precipitate `(P)` contains `Pb^(2+)` `Pb^(2+) + 2HCI rarr PbCI^(2+) overset(Hot) UNDERSET(water)(to) Solution` The filtrate `(Q)` contains `Cr^(+3)`, since itdoes give any precipitate with `H_(2)S` in acide medium .But givesprecipitate`(R )` with `H_(2)S` in alkline medium So, `R` is `Cr(OH)_(3)` and S is `Na_(2)CrO` `Cr^(+3) overset(Ammonical) underset(H_(2)S)to Cr(OH)_(3) overset(H_(2)O_(3))underset(NaOH)to underset(yellow SOLN)(Na_(2)CrO_(4))`