1.

Which of the following ions can be separated by using H_(2)S in the presence of dil. HCl ?

Answer»

`CU^(2+),CO^(2+)`
`Hg_(2)^(2+), Cu^(2+)`
`PB^(2+),Ni^(2+)`
`Cu^(2+),BI^(2+)`

Answer :A::C


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