1.

A white precipitate is obtained when:

Answer»

a solution of `BaCl_(2)` is treated with `Na_(2)SO_(3)`
a solution of `NaAlO_(2)` is heated with `NH_(4)Cl`
`H_(2)S` is pased through a solution of `ZnSO_(4)`
a solution of `ZnSO_(4)` is treated with `Na_(2)CO_(3)`

Answer :A::B::D


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