A) \[LiF<RbF<KF<NaF\]
B) \[RbF<KF<NaF<LiF\]
C) \[LiF>NaF>KF>RbF\]
D) \[LiF<NaF<KF<RbF\]
Correct Answer: D
Solution :
[d] Higher the lattice enthalpy lower will be solubility i.e., \[lattice\text{ }enthalpy\propto \frac{1}{\text{Solubility}}\] Since the lattice enthalpy of alkali metal- follow the order \[Li>Na>K>Rb\] Hence the correct order of solubility is \[LiF<NaF<KF<RbF\]
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