Question

The correct order for increasing solubility of fluorides of alkali metals is_________.

• A. $LiF<NaF<RbF<KF<CsF$0
• B. $LiF<RbF<NaF<KF<CsF$
• C. $LiF<RbF<KF<NaF<CsF$
• D. $LiF<NaF<KF<RbF<CsF$

Answer 1

The correct option is D $LiF<NaF<KF<RbF<CsF$

As we move from top to bottom in the florides of alkali metals the solubility increases from Li to Cs, due to increase in the bond length and decrease in bond energy.
So the correct order of solubility of florides of alkali metals is $LiF<NaF<KF<RbF<CsF$
Hence option D is correct order.