A certain compound `(X)` when treated with copper sulphate solution yields a brown precipitate. On adding hypo solution the precipitate turns white. The compound isA. `K_2CO_3`B. KlC. KBrD. `K_3PO_4`

A certain compound `(X)` when treated with copper sulphate solution yi

1.	A certain compound `(X)` when treated with copper sulphate solution yields a brown precipitate. On adding hypo solution the precipitate turns white. The compound isA. `K_2CO_3`B. KlC. KBrD. `K_3PO_4`
Answer» Correct Answer - B When potassium iodide is reacted with `CuSO_4` it gives iodine gas which is brown colour. This iodine gas which is brown colour. This iodine reacted with sodium thiosulphate and form white precipitate of sodium tetrathionate. `2CuSO_4 + 4KI to K_2SO_4 + I_2 uarr + 2CuI` `2Na_2S_2O_3 + I_2 to Na_2S_4O_6 darr + 2NaI`

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A certain compound `(X)` when treated with copper sulphate solution yields a brown precipitate. On adding hypo solution the precipitate turns white. The compound isA. `K_2CO_3`B. KlC. KBrD. `K_3PO_4`

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