Zinc oxide loses oxygen on heating according to the reaction, `ZnO overset"heat"to Zn^(2+) + 1/2O_2+ 2e^(-)`
It becomes yellow on heating because

Options

A. d-d transition
B. C-T spectra
C. Higher polarisation caused by `Zn^(2+)` ion
D. F-centres

Answer

D

Explanation

Among d-block elements
Max M.P. of the first transition series=Cr
Min M.P. of second transition series=Cd