Solid State Question 12
Question: How many unit cells are present in 5.0 gm of crystal AB (formula mass of AB = 40) having rock salt type structure- ( $ N _{A} $ = Avogadro’s no.)
Options:
A) $ N _{A} $
B) $ \frac{N _{A}}{10} $
C) $ 4N _{A} $
D) none of these
Show Answer
Answer:
Correct Answer: D
Solution:
[d] 4 formula units of AB are present in a unit cell
$ \therefore $ no. of unit cell $ =\frac{4}{40}\times N _{A} $
$ \Rightarrow 0.025N _{A} $
BETA
