Question

Which of the following species is/are paramagnetic
`Fe^(2+),Zn^(0),Hg^(2+),Ti^(4+)`
A. `Fe^(2+)` only
B. `Zn^(0)` and `Ti^(4+)`
C. `Fe^(2+)` and `Hg^(2+)`
D. `Zn^(0)` and `Hg^(2+)`

Answer 1

Correct Answer - A
The outermost electronic configuration of Fe is
`Fe3d^(6)4s^(2)`
`Fe^(2+)3d^(6)4s^(0)`

Since `Fe^(2+)` has 4 unpaired electron it is paramagnetic in nature.