Solid State Question 8
Question: The radius of a calcium ion is 94 pm and of the oxide ion is 146 pm. The possible crystal structure of calcium oxide will be
Options:
A) tetrahedral
B) trigonal
C) octahedral
D) pyramidal
Show Answer
Answer:
Correct Answer: C
Solution:
[c] As per formula, $ radiusratio=\frac{radiusofcation}{radiusofamon} $
$ =\frac{94}{146}=0.643 $ Since the value is between $ 0.414-0.732 $ hence the coordination no. will be 6 and geometry will be octahedral.
BETA
