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Q.

Given length of side of hexagonal unit cell is 1002pm. The volume of hexagonal unit cell is (in pm3):

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a

64×106

b

8×106

c

1.5×106

d

36×106

answer is B.

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Detailed Solution

Volume of hcp unit cell

=242r3

a=2r=1002pm

∴r = 10022 pm.

r3 = 1068×2×2

∴V=24×2×1068×2×2=1.5×106

 

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