UPSC NDA II 2023 General Ability Solved Paper

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Question : 87 of 150

Marks: +1, -0

A liquid is heated up to a certain temperature. Which one of the following situation would correspond to the boiling of the liquid?

When atmospheric pressure becomes equal to the vapour pressure
When atmospheric pressure becomes less than vapour pressure
When atmospheric pressure becomes higher than the vapour
pressure
When vapour pressure becomes equal to the air pressure

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