1.

Out of Cr^(2+),Ni^(2+),Co^(2+) and Mn^(2+) those dissolve in dil. HCl, only one gives a precipitate when H_(2)S is passed. Identify the corresponding one

Answer»

`Ni^(2+)`
`CU^(2+)`
`CO^(2+)`
`Mn^(2+)`

Solution :Dil. HCl and `H_(2)S` are group-II reagents. `Cu^(2+)` is a group-II ION (in QUALITATIVE analysis).


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