Which statement is/are correct?
(a) Ionic compounds like sulphate and phosphates of Ba and Sr `[e.g BaSO_(4),SrSO_(4),Ba_(3)(PO_(4))_(2)` and `Sr_(3)(PO_(4))_(2)]` are insoluble in water
(b) The above compounds are soluble in water
(c ) Magnitude of lattice energy `(Delta_(U)H^(Θ))` of the above compounds is greater than their hydration energy `(Delta_(hyd)H^(Θ))` High `Delta_(U)H^(Θ)` of these compounds is due to polyvalent nature of both the cations and the anions
(d) In these cases,hydration of ions fails to liberate sufficient energy to offset the lattice energy .

Answer

a,c,d

Explanation

If hydration energy `(Delta_(hyd)H^(Θ)) gt` lattice energy So, statements a,c and d are correct .