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Given below are two statements. One is labeled as Assertion (A) and the other is labeled as reason (R)
Assertion(A):
The heat required to melt 1 mole of solid water is lower than the heat required to melt 1 mole of solid NaCl
Reason(R):
Enthalpy of fusion of all solids is exothermic and the magnitude of enthalpy change depends on the strength of intermolecular interactions in the substance undergoing the phase transformation.

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If both (A) and (R) are false

If both (A) and (R) are true but (R) is not the correct explanation of (A)

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

If (A) is true but (R) is false

answer is C.

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Detailed Solution

Enthalpy of fusion of a solid is an endothermic process and the magnitude of enthalpy change depends on the strength of intermolecular interactions.

Stronger the intermolecular attractions, magnitude of enthalpy change is higher.

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