1.

Which of the following pairs of lons cannot be separated by H_2S in ammoniacal medium?

Answer»

`ZN^(2+)`, `NI^(2+)`
`Zn^(2+)Mg^(2+)`
 `Mn^(2+), Ca^(2+)`
`CO^(2+),Ca^(2+)`,

ANSWER :A


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