Question

Ques • Io) Gure Reasonia
o Nace teen yellow
on
heating​

Answer 1

when oxygen is Lost from the crystal lattice and Frenkel defect is created . The zinc ion formed then enter the voids formed due to heating...

this increase the conductivity of zinc oxide.

thus , zno turns yellow on heating because it absorbs blue wavelength of light and a non stoichiometric defect is created