When sulphur is boiled is boiled with `Na_2 SO_3`, a compound `(X)` is – InterviewSolution

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1.	When sulphur is boiled is boiled with `Na_2 SO_3`, a compound `(X)` is produced, `(X)` with excess of `AgNO_3` solution gives a compound `(Y)` which is soluble in water and produces a black coloured sulphide `(Z)`. Identify compounds `(X),(Y)` and `(Z)`.
Answer» Sulphur on boiling with `Na_(2)SO_(3)` gives `Na_(2) S_(2) O_(3) (X) S + Na_(2) S_(2) O_(3)` reacts with excess of `AgNO_(3)` solution to give `Na_(2) S_(2) O_(3) + 2 AgNO_(3) rarr 2NaNO_(3) + underset((Y)) (Ag_(2) S_(2) O_(3))` `Ag_(2) S_(2) O_(3)` is water soluble and a black ppt of `Ag_(2) S` is formed. `Ag_(2) S_(2) O_(3) + H_(2) O rarr Ag_(2) S + H_(2) SO_(4)` Hence `(X) = Na_(2) S_(2) O_(3) , (Y) = Ag_(2) S_(2) O_(3) , (Z) = Ag_(2) S`.

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