Post-UTME Physics 2017 Objective — Question 1
Question 1 of 20 from the Post-UTME Screening (Post-UTME) Physics 2017 Objective paper, with the correct answer and a full explanation.
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The boiling point of water exceeds 100C0 when
- A. its vapour pressure is less than atmospheric pressure
- B. its vapour pressure is greater than atmospheric: pressureCorrect
- C. It is slowly heated
- D. It is rapidly heated.
Explanation
Boiling occurs when vapour pressure equals atmospheric pressure; a higher boiling point corresponds to needing a higher (greater than standard atmospheric) vapour pressure to boil, i.e. at increased external pressure.
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