1.

IN which of the following pairs, both the ions are coloured in aqueous solutions ?

Answer»

`Sc^(3+), Ti`
`Sc^(3+), CO^(2+)`
`Ni^(2+), Cu^(+)`
`Ni^(2+), Ti^(3+)`

Solution :Both `Ni^(2+)` and `Ti^(3+)` contain UNPAIRED electrons.


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