Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy?

Options

A. `BaSO_(4)`
B. `SrSO_(4)`
C. `CaSO_(4)`
D. `BeSO_(4)`

Answer

D

Explanation

Soludility order of sulphates in water `BeSO_(4) gt CaSO_(4) gt SrSO_(4) gt BaSO_(4)`
`BeSO_(4)` has greater hydration enthalpy than its lattice enthyalpy
Because `Be^(2+)` ion has maximum charge density.