Pink colour of LiCl crystals is due to:

Options

A. Schottky defect
B. Frenkel defect
C. Metal excess defect
D. Metal deficiency defect

Answer

C

Explanation

When a crystal of LiCl is heated in an atmosphere of Li vapour, the Li atoms lose electrons to form `Li^(+)` ions. The released electrons diffuse into the crystal and occupy anionic sites (F-centres). These electrons impart pink colour to the LiCl crystal.