Solid State Question 275
Question: In a solid ‘AB’ having the $ NaCl $ structure, ‘A’ atoms occupy the corners of the cubic unit cell. If all the face-centered atoms along one of the axes are removed, then the resultant stoichiometry of the solid is
Options:
A) $ AB_2 $
B) $ A_2B $
C) $ A_4B_3 $
D) $ A_3B_4 $
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Answer:
Correct Answer: D
Solution:
[d] Effective number of ‘A’ atoms $ =( 8\times \frac{1}{8} )+( 4\times \frac{1}{2} )=3 $ Effective number of ‘B’ atoms $ =( 12\times \frac{1}{4} )+1=4 $
$ \therefore $ Formula of the solid $ =A_3B_4 $ .
BETA
