Q.

The only incorrect statement for the packing of identical spheres in two dimension is:

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a

there is only one void per atom m both, square and hexagonal close packing

b

for hexagonal close packing, coordination number is 6.

c

for square close packing. coordination number is 4.

d

hexagonal close packing is more efficiently packed than square close packing.

answer is C.

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Detailed Solution

Coordinaation number in square closed paking =8 

Coordination number in hexagonal close parking = 12.

There is more than one void per atom in both, square and hexagonal close packing

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