Solid State Question 10
Question: A solid has a structure in which ‘W’ atoms are located at the comers of a cubic lattice ‘O’ atoms at the centre of edges and Na atoms at the centre of the cube. The formula for the compound is
Options:
A) $ Na_2WO_3 $
B) $ Na_2WO_2 $
C) $ NaWO_2 $
D) $ NaWO_3 $
Show Answer
Answer:
Correct Answer: D
Solution:
[d] In a unit cell, W atoms at the corner $ =\frac{1}{8}\times 8=1 $ O-atoms at the centre of edges $ ~=\frac{1}{4}\times 12=3 $ Na-atoms at the centre of the cube = 1 $ W:O:Na=1:3:1 $ Hence, formula $ =NaWO_3 $
BETA
