Question

The colours associated with the compounds of 3d transition metals is due to

• A. d-d electron excitation
• B. p-p electron excitation
• C. f-f electron excitation
• D. None of the above

Answer 1

The correct option is A d-d electron excitation

The colour of the transition metal ion arises from the excitation of electrons from the d-orbitals of lower energy to the d-orbitals of higher energy. The energy required is for this d-d electron transition is available in the visible range. They absorb visible range wavelength and exhibit the complementary colour.