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In the following figure , the blank X is...

In the following figure , the blank X is known as ___ and why ?

A

Electron trap , because an electron is present here

B

Metal deficient centre , since negative charge is present here

C

F-centre , since it imparts colour to the crystal

D

F-centre, since it is responsible for positive charge on the crystal

Text Solution

Verified by Experts

The correct Answer is:
C
The anionic sites occupied by the unpaired electrons are called F-centres from the German word Farbenzenter for colour centre.
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