A liquid is heated up to a certain temperature. Which one of the following situation would correspond to the boiling of the liquid?
- A. When atmospheric pressure becomes equal to the vapour pressure ✓
- B. When atmospheric pressure becomes less than vapour pressure
- C. When atmospheric pressure becomes higher than the vapour pressure
- D. When vapour pressure becomes equal to the air pressure
Correct Answer: A. When atmospheric pressure becomes equal to the vapour pressure
Explanation
Boiling occurs when the vapour pressure of the liquid becomes equal to the surrounding atmospheric pressure.
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