The low solubility of LiF and that of CsI in water are respectively due to which of the properties of the alkali metal ions?

Options

A. Higher hydration enthalpy of `Li^(+)`, higher lattice enthalpy of `Cs^(+)`
B. Smaller hydration enthalpy of `Li^(+)`, higher lattice enthalpy of `Cs^(+)`
C. Smaller lattice enthalpy of `Li^(+)`, higher hydration enthalpy of `Cs^(+)`
D. Higher lattice enthalpy of `Li^(+)`, smaller hydration enthalpy of `Cs^(+)`

Answer

D

Explanation

The lattice enthalpy of `Li^(+)` is highest and the hydration enthalpy of `Cs^(+)` is lowest among the alkali metals.