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
Verified Correct Answer: A.
Chemical Principles & Mechanism
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.
Source: Myschool Past Questions Archive (Record #737)