ChemistryWhy does the boiling point of awater decrease at higher altitudes?

Why does the boiling point of awater decrease at higher altitudes?

  1. A
    Atmospheric pressure is low at higher altitudes.
  2. B
    Temperature is low at higher altitudes.
  3. C
    Atmospheric pressure is high at higher altitudes.
  4. D
    None of the above. 

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    Solution:

            Air pressure exerts a force on the water itself which must be overcome by the water to boil.
            The higher the air pressure, the higher the temperature at which water boils.
            At higher altitudes or at mountains air pressure decreases ,the boiling point of water also decreases.
     
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