Colour of compounds occurs due to phenomenon of polarisation, charge transfer, d-d transition and H. — Chemical Bonding Chemistry Question

Question

Colour of compounds occurs due to phenomenon of polarisation, charge transfer, d-d transition and H.O.M.O.-L.U.M.O. transition. Most of the transition metal complex compound are coloured either due to d-d electron transition or charge transfer and ionic compounds are coloured due to polarisation of anion.