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When electrons are trapped into the crys...

When electrons are trapped into the crystalline anion vacancy the defect is known as

A

schottky defect

B

Stoichiometric defect

C

Frenkel defect

D

F-centres

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The correct Answer is:
4
The lattice sites containing the electrons trapped in the anion vacancies are called `F-`centres because they are responsible for imparting colour to the crystals (`F=`Farbe which is a German word for colour).
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