S Block Elements Question 91
Question: The solubility order for alkali metal fluoride in water is:
Options:
A) $ LiF<RbF<KF<NaF $
B) $ RbF<KF<NaF<LiF $
C) $ LiF>NaF>KF>RbF $
D) $ LiF<NaF<KF<RbF $
Show Answer
Answer:
Correct Answer: D
Solution:
[d] Higher the lattice enthalpy lower will be solubility i.e., $ latticeenthalpy\propto \frac{1}{Solubility} $ Since the lattice enthalpy of alkali metal- follow the order $ Li>Na>K>Rb $ Hence the correct order of solubility is $ LiF<NaF<KF<RbF $
BETA
