Question

The water boils when :

1.Saturated vapour pressure of water becomes equal to atmospheric pressure

2. Boiling point of water becomes more than atmospheric pressure

3. Saturated vapour pressure of water is less than atmospheric pressure

4. Vapour pressure of water becomes more than atmospheric pressure

Answer 1

The boiling point of a substance is the temperature at which the vapor pressure of the liquid is equal to the pressure surrounding the liquidand the liquid changes into a vapor.Boling point of water is 100⁰C.

So the answer is (1)