Statement-1: Heat of solution is positiv...

Statement-1: Heat of solution is positive when `Na_(2)SO_(4)10H_(2)O` is dissolved in water bu it is negative when anhydrous `CuSO_(4)` is dissolved in water.
Statement-2: Molar masses of `Na_(2)SO_(4)10H_(2)O and CuSO_(4)` are different.

Statement-1 is true, statement-2 is true, statement-2 is a correct explanation for statement-1

Statement-1 is true, statement-2 is true, statement-2 is not a correct explnation for statement-1

Statement-1 is true, statement-2 is false.

Statement-1 is false, statement-2 is true.

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Statement-1: Heat of solution is positive when `Na_(2)SO_(4)*10H_(2)O` is dissolved in water bu it is negative when anhydrous `CuSO_(4)` is dissolved in water. Statement-2: Molar masses of `Na_(2)SO_(4)*10H_(2)O and CuSO_(4)` are different.