Statement I : Standard enthalpy of fusion of HCl is greater than NH₃
Statement II : Fusion temperature of HCl is greater than NH₃

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if statement I is correct but statement II is incorrect.

if both statement I and statement II are correct.

if statement I is incorrect but statement II is correct.

if both statement I and statement II are incorrect.

answer is B.

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Detailed Solution

Standard enthalpy of fusion of HCl is lesser than NH₃ because in HCl intermolecular attractive forces are dipole - dipole attractions while in NH₃ intermolecular forces are hydrogen bond. Stronger the attractive forces fusion temperature is more

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