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Physics Past Questions and Answers

Topic: Relationship between saturated vapour pressure (S.V.P) and boiling

Jamb Physics Questions - Relationship between saturated vapour pressure (S.V.P) and boiling

Question 6:
A vapour is said to be saturated when
  • A A dynamic equilibrium exists between liquid molecules and the vapour molecules
  • B A dynamic aquilibrium exists such that more molecules return to the liquid than are living it
  • C The temperature of the vapour varies
  • D The vapour pressure is atmospheric
View Answer & Explanation
Question 7:
I. A liquid boils when its saturated vapour pressure is equal to the external pressure
II. Dissolved substances in pure water lead to increase in the boiling point.
III. When the external pressure is increased, the boiling point increases.
IV. Dissolved substances in pure water decrease the boiling point.
Which combination of the above are peculiarities of the boiling point of a liquid?
  • A I, II and III
  • B I, II, III and IV
  • C I, II and IV
  • D II, III and IV
View Answer & Explanation
Question 8:
A saturated vapour pressure of a liquid increases when the
  • A Temperature of a liquid increases
  • B Volume of the liquid increases
  • C Volume of the liquid decreases
  • D Temperature of the liquid decreases
View Answer & Explanation
Question 9:
I. A liquid boils when its saturated vapor pressure is equal to the external pressure
II. Dissolved substances in pure water lead to an increase in the boiling point.
III. When the external pressure is increased, the boiling point increases.
IV. Dissolved substances in pure water decreases the boiling point

Which of the above combinations are peculiarities of the boiling point of a liquid?
  • A I, II and III only
  • B I, II, III, and IV
  • C I, II, and IV
  • D II, III, and IV
View Answer & Explanation