Question

The appearance of colour in solid alkali metal halides is generally due to :-

1. Frankel Defect

2. Interstitial Defect

3. F-Centres

4. Schottky Defect​

Answer 1

Answer:

i think it's option 3(F-centres)

Explanation:

In F-centre defect in which an anionic vacancy in a crystal is filled by one or more unpaired electron. ... So, appearance of colour in solid alkali metal halides is generally due to F-centre

hope it helps you

Answer 2

Answer:

Your answer is 3rd bit I.e.

F-Centers.

explanation is on the top in the image...

Hope it helps!!!!!......

mark as brainleist and give thanks!!!!!!.....

Do follow me!!!!!!!.....