A crystal has KCl type structure. In this crystal, shortest distance between a cation and anion is 200 pm. The volume of the unit cell is a × 10-22 cm3. Value of a is

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answer is 64.

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Detailed Solution

a=2r++ra=2×200=4×10−8cm Vol. of unit cell =a3=4×10−83cm3=64×10−22cm3

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