NEET Physics (general) MCQ Question
Which of the following statements about the melting point and thermal equilibrium of substances is correct?
The melting point is the temperature at which solid and liquid states are in thermal equilibrium.
The melting point is independent of pressure and remains constant for all substances.
The normal melting point occurs at standard atmospheric pressure only for metals.
A substance can have different melting points depending on the surrounding pressure conditions.
Correct Answer
Detailed Explanation
The melting point is defined as the temperature at which the solid and liquid states of a substance are in thermal equilibrium, as indicated in the context provided. It is also dependent on pressure, which contradicts the claims in options B and C, and although D is true, it is not the most straightforward statement.
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