Question

moas of the transition metal compounds are coloured why

Answer 1

Transition metal compounds are often coloredbecause of transitions of electrons between d-orbitals of different energy. (see Transition metal#Coloured compounds). ... Similarly,color is due to the energy absorbed by thecompound, when an electron transitions from the HOMO to the LUMO.

Answer 2

Ans;→

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