Question

Why compounds of transition metals are coloured?

Answer 1

As we know that transition metals have d orbitals and they have unpaired electrons in their d orbitals. These unpaired electrons absorb some part of the visible light abdomen reflect other.

The part of light reflected is seen by us and we find them coloured

Hope it's clear

Answer 2

Ans;→ Due to the presence of unpaired vacant d- orbitals and d-d transition, compounds of the transition metals are generally coloured.