Assertion : `SO_(4)^(2-)` is estimated as `BaSO_(4)`, but not as `MgSO_(4)`
Reason : Ionic radius of `Mg^(2+)` is smaller than that of `Ba^(2+)`

Options

A. If both (A) and (R) are correct and (R) is the correct explanation of (A).
B. If both (A) and (R) are correct, but (R) is not the correct explanation of (A).
C. If (A) is correct, but (R) is incorrect.
D. If both (A) and (R) are incorrect.

Answer

B

Explanation

Sulphate is estimated as `BaSO_4` because `Ba^(2+)` being larger ion is hydrated to a lesser extent hence it has high lattice energy group.