Question

kcl crystal is colourless on heating of potassiu vapours it become violet why

Answer 1

Answer:

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Answer 2

Answer:

It is because of the Metal excess defect due to anionic vacancies. When crystals of KCl are heated in an atmosphere of potassium vapour, the potassium atoms are deposited on the surface of the crystal. ... The anionic sites occupied by unpaired electrons are called F-centres (for colour centre

Explanation:

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