The normal boiling point of a liquid is defined as
-
A.
the temperature at which its vapour pressure equals the atmospheric pressure -
B.
the temperature at which bubbles begin to form -
C.
the temperature at which the vapour pressure equals 1 temperature -
D.
the temperature at which the rate of condensation of vapour equals the rate of vaporisation of the liquid -
E.
the temperature at which the space above the liquid is saturated
Correct Answer: Option A
Explanation
The boiling point of a substance is the temperature at which the vapor pressure of a liquid equals the pressure surrounding the liquid and the liquid changes into a vapor.