Edge length of a cubic unit cell is $400$ pm. Its face diagonal would be:

600

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200

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566

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692

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Solution

The correct option is D $566$ pm
Given that, the edge length of a cubic unit cell = 400ppm

So, the length of face diagonal $= \sqrt{2} a = \sqrt{2} \times 200 = 566$ pm

The correct option is ( C )

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Edge length of a cubic unit cell is 400 pm. Its face diagonal would be

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