Question

The ion pair of the following in which both the ions have unpaired electron-
A. `Cr^(3+),Co^(2+)`
B. `Sc^(3+),Cr^(3+)`
C. `Cu^(+),Fe^(3+)`
D. `Mn^(2+),Cu^(+)`

Answer 1

Correct Answer - A
`Cr^(+3)=4s^(@)3d^(3)`
`Co^(+2)=4s^(s)3d^(5)`