(A) :When CuSO4 is dissolved in water, the solution is warmed up.
(R) :Hydration energy of CuSO4 is higher than its lattice energy.

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Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are true and (R) is not the correct explanation of (A)

(A) is true but (R) is false

Both (A) and (R) are false

answer is A.

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Detailed Solution

We know, when CuSO₄ is dissolved in water the lattice energy decreases since molecules break and bind, increasing the solubility. The hydration energy for the reaction is generally exothermic whilst the lattice energy is endothermic, and available literature suggests that exothermic reaction heat is greater than endothermic reaction heat.
Hence, correct option is: (A) Both (A) and (R) are true and (R) is correct explanation of (A)

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