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1. Solution and colligative properties — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistry1. Solution and colligative properties1 Mark
MCQ
The pressure under which liquid and vapour can coexist at equilibrium is called the
  • A
    Limiting vapour pressure
  • B
    Real vapour pressure
  • C
    Normal vapour pressure
  • ✓
    Saturated vapour pressure
✓

Answer

Correct option: D.
Saturated vapour pressure
d
Ordinary evaporation is a surface phenomenon - some molecules have enough kinetic energy to escape. If the container is closed, then an equilibrium is reached where an equal number of molecules return to the surface.

The pressure at which this equilibrium where the coexistence of liquid and vapour is achieved is called the saturated vapor pressure.

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