Chemistry
Grade-6
Easy

Question

The normal boiling point is the temperature at which vapor pressure is equal to:

  1. 1atm
  2. 2atm
  3. 3atm
  4. 4atm

Hint:

V.P.=A.P. liquid starts to boil.

The correct answer is: 1atm


    • At the normal boiling point of a liquid, the vapor pressure is equal to the standard atmospheric pressure i.e. 1 atm.
    • At standard atmospheric pressure, the liquid particles start to escape the surface, and the liquid boils.
    • When the vapor pressure is greater than the atmospheric pressure the liquid will boil at a higher temperature.
    • When the vapor pressure is less than the atmospheric pressure the liquid will boil at a lower temperature.

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