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A solid has a b.c.c. structure . If the ...

A solid has a `b.c.c.` structure . If the distance of closest approach between the two atoms is `1.73 Å`. The edge length of the cell is `:`

A

200 pm

B

`sqrt3//sqrt2 " pm"`

C

142.2 pm

D

`sqrt2" pm"`

Text Solution

Verified by Experts

The correct Answer is:
A
In bcc lattice distance of closest approach is `1//2`of body diagonal.
`i.e.,sqrt3/2a=1.73Åor a =1.73/sqrt3times2`
=`2Å =200" pm"`
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