1.

Find out the incorrect pair

Answer»

`Sc^(3+), Ti^(4+)`
`Ti^(3+). Ti^(2+)`
`Cr^(2+), Mn^(3+)`
`Cu^(+), Zn^(2+)`

Solution :`Ti^(3+). Ti^(2+)`have `d^(1)` and `d^(2)` configuration WHEREAS others have same configuration.


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