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Question

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

A
600 pm
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B
200 pm
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C
566 pm
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D
692 pm
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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 =2a=2×200=566 pm

The correct option is ( C )

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