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Density

If the edge l...

Question

If the edge length of a KCl cell is 488 pm, what is the length of KCl bond if it crystallizes in the fcc structure?

A

122 pm

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B

244 pm

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C

488 pm

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D

974 pm

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Solution

The correct option is B 244 pm
In FCC structure of NaH, Na atom is present at the corner and H is present at the edge center.
Hence,
$B o n d l e n g t h = \frac{E d g e l e n g t h}{2} = \frac{488}{2} = 244 p m$

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