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 .

Which statement is/are correct? (a) Ionic compounds like sulphate and

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

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