Previous Year NEET Question- Chemical Thermodynamics

• NEET 2016, Question 37: A liquid is in equilibrium with its vapour at its boiling point. Which of the following increases the boiling point of the liquid?

(A) Increasing the pressure on the liquid (B) Adding more of the liquid to the system (C) Increasing the temperature of the liquid (D) None of the above

The answer is (A) Increasing the pressure on the liquid

When the pressure on a liquid increases, the boiling point of the liquid also increases. This is because the higher pressure forces the liquid molecules closer together, making it more difficult for them to escape from the liquid and turn into vapor.

(B) Adding more of the liquid to the system will not affect the boiling point of the liquid.

(C) Increasing the temperature of the liquid will not increase the boiling point of the liquid.

(D) None of the above is not a correct answer.