Home Chemistry Solid State NTA Abhiyas Question The density of KBr is 2.75 g cm -3 , length …
Chemistry Solid State NTA Abhiyas Question Single Correct MCQ
Published on: August 13, 2026

The density of KBr is 2.75 g cm -3 , length of the unit cell is 654 pm. K = 39, Br = 80, then what can be true about the predicted nature of the solid? (Given: N A = 6.023 x 10 23 )

A
Solid has face centred cubic system with co-ordination number = 6
B
Solid has simple cubic system with co-ordination number = 8
C
Solid has face centred cubic system with co-ordination number = 12
D
None of the above

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The correct answer is:
A

Given that = 2.75 g cm -3

we need to find type of unit cell

So fee unit cell

In FCC 1 atm surrounded by 6 atoms so coordination number is 6.

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