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NEETChemistryThermodynamics (C)

During the melting of a solid substance at constant pressure and temperature, what happens to the temperature?

Options

  1. AIt decreases.
  2. BIt remains constant.
  3. CIt increases.
  4. DIt fluctuates.

Correct answer

B. It remains constant.

Step-by-step solution

During the melting of a solid substance at constant pressure and temperature, the temperature remains constant. This is because the heat is absorbed during the phase change without affecting the temperature until the phase change is complete.

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