Question

Which ion exhibits d-d transition and paramagnetism as well?

Answer 1

Definitions :

1.) d-d transition — This is the shifting of electrons between the lower energy d orbital to higher energy d orbital by absorption of energy and vice versa.

2.) Paramagnetism — It is due to the presence of unpaired electrons in a material, meaning all atoms with incompletely filled atomic orbitals are paramagnetism.

An example of an ion which exhibits d-d transition and paramagnetism is the

MnO₄⁻²

Reasons :

It has one unpaired electron which can be shifted between the lower energy level and the higher energy level and thus a d-d transition exists.

Just by the presence of the unpaired electron we can say that it is also paramagnetic.