Solid `A^(+)B^(-)` has a bcc structure .If the distance of closest apporach between two atoms is 173 pm ,the edge length of the cell is:
Solid `A^(+)B^(-)` has a bcc structure .If the distance of closest apporach between two atoms is 173 pm ,the edge length of the cell is:
A. 200 pm
B. `sqrt(3)//sqrt(2)` pm
C. `142.2` pm
D. `sqrt(2)` pm
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Correct Answer - A
For bcc, d `=(sqrt(3))/(2)a`
or `a=(2d)/(sqrt(3))=(2xx173)/(1.732)=200` pm
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