\( \mathrm{BaCl}_{2} \) solution gives a white precipitate with a solution of a salt, which diss...

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\( \mathrm{BaCl}_{2} \) solution gives a white precipitate with a solution of a salt, which dissolves in dilute hydrochloric acid with the evolution of colourless, pungent smelling gas. The gas as well as the salt both are used as bleaching agent in the textile industries. The salt contains:
(a) Sulphite
(b) Sulphide
(c) Acetate
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