1.

Which one among the following pairs of ions cannot be separated by H_2S in dilute hydrochloric acid?

Answer»

 `Bi^3+``Sn^2+`
` AI^(3+) Hg^(2+)`
`Zn^(2+)CU^(2+)`
`Ni^(2+),Cu^(2+)`

Answer :A


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