Q: If pressure is applied to the following equilibrium, $liquid \rightleftharpoons vapours$ the boiling point of liquid
(A) will increase
(B) will decrease
(C) may increase or decrease
(D) will not change
Solution: Boiling point of a liquid is the temperature at which vapour pressure became equal to atm pressure. If the pressure is applied to the above equilibrium the reaction will go to the backward direction, i.e. vapour pressure decrease hence the boiling point increase.