NEET Chemistry ยท Medium

Thermodynamics: State effect MCQ

Solve this quality-checked NEET multiple-choice question, then review the correct answer and explanation.

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State effectMediumQuestion 23044

Question

Enthalpy of vaporisation is always:

  1. A
    Positive
    Correct
  2. B
    Negative
  3. C
    Zero
  4. D
    Independent of substance

Correct answer

Positive

Explanation

Heat is needed to separate liquid molecules into vapour.