Boiling Point (क्वथनांक)
The temperature at which the vapour pressure of a liquid becomes equal to the atmospheric pressure or external pressure is called boiling point of the liquid.
Or
वह तापमान जिस पर किसी द्रव का वाष्प दाब वायुमंडलीय दाब या बाहरी दाब के बराबर हो जाता है, द्रव का क्वथनांक कहलाता है।
Factors Affecting Boiling Point :-
Let discus about the factors affecting the boiling point. The factors that affect the boiling point are following :-
1. Force of Attraction or Intermolecular Force :-
(i) Remember, the strength of intermolecular forces influences the boiling point of a liquid.
(ii) When the intermolecular force or the force of attaraction between the molecules of liquid is weak, the boiling point will be less.
(iii) When the intermolecular force or the force of attaraction between the molecules of liquid is strong, the boiling point will be high.
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