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The flame colours of metal ions are due ...

The flame colours of metal ions are due to :

A

Frenkel defect

B

Schotty defect

C

metal deficiency defect

D

meta excess defect .

Text Solution

Verified by Experts

The correct Answer is:
D
This defect arises when a compound has excess metal ion . If a negative ion is absent from its lattice site leaving a hole occupied by electron . The holes occupied by electrons are called F-centres . Greater the number of F-centres greater is the intensity of colour .
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