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if the edge length of a NaH unit cell is...

if the edge length of a NaH unit cell is 488 pm, what is the length of Na-H bond if it crystallises in the fcc structure ?

A

`112 pm`

B

`244 pm`

C

`488 pm`

D

`976 pm`

Text Solution

Verified by Experts

The correct Answer is:
B
NaH has fcc structure similar to that of NaCl.
Edge length `=2(r_(c)+r_(a))=488` pm
Bond length (Na-H) `=r_(c)+r_(a)=244` pm
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