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NEETChemistryChemical Equilibrium

What gives rise to a constant vapor pressure in a closed container during evaporation?

Options

  1. AThe increase in the number of liquid molecules in the vapor phase
  2. BThe decrease in the number of liquid molecules in the vapor phase
  3. CThe equilibrium between molecules leaving the liquid and returning to the liquid
  4. DThe absence of any vapor molecules in the container

Correct answer

C. The equilibrium between molecules leaving the liquid and returning to the liquid

Step-by-step solution

A constant vapor pressure is achieved due to an equilibrium in which the number of molecules leaving the liquid equals the number returning to the liquid from the vapor.

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