An aqueous solution containing ions will not give:

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Problem

An aqueous solution containing

\text{S}^{2-}

ions will not give: (1) Yellow precipitate with the suspension of

\text{CdCO}_3

in water (2) Black precipitate with lead acetate solution (3) White precipitate with

\text{BaCl}_2

solution (4) Purple colour with sodium thiosulphate solution