A solution is made by mixing one mole of volatile liquid A with 3 moles of volatile liquid B . The vapour pressure of pure A is 200 mm Hg and that of the solution is 500 mm Hg. The vapour pressure of

Question

A solution is made by mixing one mole of volatile liquid A with 3 moles of volatile liquid B . The vapour pressure of pure A is 200 mm Hg and that of the solution is 500 mm Hg. The vapour pressure of pure B and the least volatile component of the solution, respectively, are :

TestHub · Accepted Answer

​ P S ​ = P A o ​ ⋅ X A ​ + P B o ​ ⋅ X B ​ 500 = 200 × 4 1 ​ + P B o ​ ⋅ 4 3 ​ P B o ​ = 600 mm Hg ​ As P A o ​ < P B o ​ ⇒ A is least volatile.

Chemistry - Liquid Solution Question with Solution | TestHub

Options:

Doubts & Discussion