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Matter in Our Surroundings — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceMatter in Our Surroundings1 Mark
MCQ
Evaporation of a liquid _____________?
  • A
    Is dependent on its mass
  • B
    Increases with increasing pressure
  • C
    Is not affected by pressure
  • D
    Decreases with increasing pressure
✓

Answer

  1. Decreases with increasing pressure

Exaplantion:

Evaporation is a type of vaporization of a liquid that occurs from the surface of a liquid into a gaseous phase that is not saturated with the evaporating substance.

The rate of evaporation can also increase with a decrease in the gas pressure around a liquid. Molecules like to move from areas of higher pressure to lower pressure.

The molecules are basically sucked into the surrounding area to even out the pressure.

Once the vapor pressure of the system reaches a specific level, the rate of evaporation will slow down.

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