1.

Which one among the following pairs of ions cannot be separated by H_(2)S in dilute hydrochloric acid ?

Answer»

`BI^(3+),SN^(4+)`
`Al^(3+),Hg^(2+)`
`Zn^(2+),Cu^(2+)`
`NI^(2+),Cu^(2+)`

Answer :B


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