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Q.

If the distance between Na+ and Cl– ions in NaCl crystal is 265 pm, then edge length of the unit cell will be

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a

795 pm

b

530 pm

c

132.5 pm

d

265 pm

answer is B.

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Detailed Solution

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Edge length of unit cell = 2 x (Distance between Na+ and Cl-ions)

⇒Edge length of unit cell = 2 x 265 = 530 pm

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