Asked by  | 19th Sep, 2008, 12:44: AM

Expert Answer:

because there are excess of K+ which attract Cl-and electrons are trapped at the site of anion forming F-centre. It absorbs color from visible light and radiates complimentary color.

Answered by  | 19th Sep, 2008, 08:11: AM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.