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Q.

What is the crystal structure of NaCl?

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a

Body centered cubic

b

Face centered cubic

c

Tetrahedral

d

Octahedral

answer is B.

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Detailed Solution

The crystal structure of ionic compound (NaCl) can predict by calculate the ration of cation radius to anion radius.

For NaCl, r+(cation)r−(anion)=0.541 . 

If rcation/ranion  ratio is  0.414 – 0.732, Co-ordination number of ion is 6.

Hence, the geometry of NaCl is face centered cubic crystal (FCC).

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