1.

Silver nitrate solution when added to a colorless aqueous solution E forms a white precipitate which dissolves in excess of E. If the white precipitate is heated with water it turns black and the supernatant solution gives a white precipitate with acidified barrum nitrate solution. Therefore, E is :

Answer»

`Na_(2)S`
`Na_(2)S_(2)O_(3)`
`Na_(2)SO_(3)`
`Na_(2)SO_(4)`

Answer :B


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