Practice question
Question
During the melting of ice at 0∘C, why does the temperature remain constant despite heat being supplied?
Explanation
The heat supplied during melting (latent heat of fusion) is used to change the state from solid to liquid, overcoming intermolecular forces, not to increase temperature (Section 10.8). As per NCERT, applying relevant law/formula with correct units and sign convention leads to Heat is used to change the state, not raise temperature. This satisfies dimensional consistency and physical conditions given, so option A is scientifically correct.