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A solid has a bcc structure. If the dist...

A solid has a bcc structure. If the distance of closest approach between the two atoms is `1.73.^(@)A`. The edge length of the cell is

A

200 pm

B

`(sqrt3)/(sqrt2) pm `

C

142.2 gm

D

`sqrt2`

Text Solution

Verified by Experts

The correct Answer is:
A
`r_("atom") = (sqrt3)/(4)` a , Also closest approach in bcc lattice is `1/2` of body diagonal , i.e. `(sqrt3)/(2) a = 1.73 Å`
or `a=(1.73xx2)/(sqrt3) = 1.966Å = 199.6` pm
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