Solid State Question 204
Question: The edge length of face centred unit cubic cell is $ 508pm. $ If the radius of the cation is $ 110pm, $ the radius of the anion is
[CBSE PMT 1998]
Options:
A) $ 285pm $
B) $ 398pm $
C) $ 144pm $
D) $ 618pm $
Show Answer
Answer:
Correct Answer: C
Solution:
Distance between centres of cation and anion $ =\frac{d}{2}=\frac{508}{2}=254pm $
$ r _{c}+r _{a}=254pm $ or $ 110+r _{a}=254 $ or $ r _{a}=144pm $
BETA
