An aqueous solution of inorganic compounds (X) gives following reactions. (i) With an aqueous solution of barium chloride a precipitate insoluble in dilute `HCl` is obtained. (ii) Addition of excess of `Kl` gives a brown precipitate which turns white on additon of excess of hyposolution. (iii) With an aqueous solution of `K_(4)[Fe(CN)_(6)`, a brown coloured precipitate is obtained. Identity (X) and gives equation for the reaction for (i),(ii) and (iii) observations.

An aqueous solution of inorganic compounds (X) gives following reactio

1.	An aqueous solution of inorganic compounds (X) gives following reactions. (i) With an aqueous solution of barium chloride a precipitate insoluble in dilute `HCl` is obtained. (ii) Addition of excess of `Kl` gives a brown precipitate which turns white on additon of excess of hyposolution. (iii) With an aqueous solution of `K_(4)[Fe(CN)_(6)`, a brown coloured precipitate is obtained. Identity (X) and gives equation for the reaction for (i),(ii) and (iii) observations.
Answer» Correct Answer - `X=CuSO_(4)` (Step (i) suggested that compound (X) contain `SO_(4)^(2-)` redical. (ii) step (ii) suggested that the compound (X) contain `Cu^(2+)` radical. Reaction (i) `CuSO_(4)(X)+BaCl_(2) to BaSO_(4)downarrow("white")+CuCl_(2),BaSO_(4)` is insolule in `HCl` (ii) `2CuSO_(4)(X)+4KIto2CuI_(2)+2K_(2)SO_(4)` `2CuI_(2)("unstable") to 2Cu_(2)I_(2)downarrow("white")+I_(2)uparrow` `I_(2)+2Na_(2)S_(2)O_(3) toNa_(2)S_(4)O_(6)("colourless")+2NaI("colourless")` `2CuSO_(4)(X)+K_(4)[CN)_(6)] to Cu_(2)[Fe(CN)_(6)]downarrow("Brown")+2K_(2)SO_(4)`

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