1.

An aqueous solution of a substance gives a white precipitate on treatment with NaCI solution, which dissolves on heating. When H_(2)S gas is passed through it's hot acidic solution, a black precipitate is obtained. The cations which are not associated with this test are:

Answer»

`Mg^(2+)`
`AG^(+)`
`Hg_(2)^(2+)`
`PB^(2+)`

ANSWER :A::B::C


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