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Assertion: The presence of a large numbe...

Assertion: The presence of a large number of Schottky defects in NaCl lowers its density.
Reason: In NaCl, there are approximately `10^(6)` Schottky pairs per `cm^(3)` at room temperature.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion

B

If both assertion and reason are true but reason is not the correct explanation of the assertion

C

If assertion is true but reason is false

D

If the assertion and reason both are false.

Text Solution

Verified by Experts

The correct Answer is:
B
When an atom or an ion is missing from its normal lattice site, a lattice vacancy or defect is created, which is called schottky defect. Due to missing density of crystal will be lowered.
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