A bluish green coloured compound 'A' on heating gives two products 'B' and 'C'. A metal 'D' is deposited on passing H_(2) through heated 'B'. The compound 'A' and 'B' are insoluble in water. 'B' is black in colour, dissolves in HCI and on treatment with K_(4)[Fe(CN)_(6)] gives a chocolate brown ppm of compound 'E'. 'C' is colourless, odourless gas and turns lime water milkly. Compound 'A' is

A bluish green coloured compound 'A' on heating gives two products 'B'

1.	A bluish green coloured compound 'A' on heating gives two products 'B' and 'C'. A metal 'D' is deposited on passing H_(2) through heated 'B'. The compound 'A' and 'B' are insoluble in water. 'B' is black in colour, dissolves in HCI and on treatment with K_(4)[Fe(CN)_(6)] gives a chocolate brown ppm of compound 'E'. 'C' is colourless, odourless gas and turns lime water milkly. Compound 'A' is
Answer» `CuSO_(4)` `CuCO_(3)` `FeSO_(4)` `CrCl_(3)` Solution :`UNDERSET(A)(CuCO_(3)) to underset("Black")(CuO)+underset(C)(CO_(2))` `CuO+H_(2) overset(DELTA)to underset(D)(Cu)+H_(2)O` `CuO+2HCl to CuCl_(2)+H_(2)O` `2CU^(2+)+K_(4)[Fe(CN)_(6)] to Cu_(2) underset(underset(E)("chacelate brown ppt"))([Fe(CN)_(6)]) darr`