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Question

Statement: Packing fraction of a lattice structure depends on the radius of the atom crystallizing in it.

State whether the given statement is true or false.

A
True
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B
False
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Solution

The correct option is A True
Packing efficiency is the ratio of the total volume occupied by atoms to the total volume of the cube.

Packing efficiency =n×43πr3V

For FCC, n=4, r=a22, V=a3

Packing fraction =4×43π×(a32)3a3=π32=0.74

Hence, packing efficiency depends on the radius of an atom.

Hence, the given statement is true

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