In the following figure, the blank X is known as ……. And wh…

Chemistry Solid State General Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 12, 2026

In the following figure, the blank X is known as ……. And why?

Electron trap, because an electron is present here.

Metal deficient centre, since negative charge is present here.

F – centre, since it imparts colour to the crystal.

F – centre, since it is responsible for positive charge one the crystal.

Text Solution

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The correct answer is:

The anionic sites occupied by the unpaired electrons are called F-centres form the German word Farbenzenter for colour centre.

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