1.

Which of the following pair is precipitated with (NH_4)_2CO_3 in the presence of basic medium ?

Answer»

`CU^(2+), PB^(2+)`
`Ni^(2+), Ca^(2+) `
`Ca^(2+), Ba^(2+) `
`Na^(+),K^(+)`.

Solution :Both belong to GROUP V.l


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