Question

The highest temperature at which vapour pressure of a liquid can be measured is:

• A. critical temperature
• B. inversion temperature
• C. critical solution temperature
• D. boiling point of liquid

Answer 1

The correct option is D boiling point of liquid

The highest temperature at which vapour pressure of a liquid can be measured is the boiling point because at boiling point the vapour pressure is equal to atmospheric pressure. With any incremental increase in that temperature, the vapour pressure becomes sufficient to overcome atmospheric pressure and lift the liquid to form vapour bubbles inside the bulk of the substance.