question_answer

Based on the given diagram, the correct statements regarding the homogenous solutions of two volatile liquids is

(1) Plots AD and BC show that Raoult's law is obeyed for the solution in which B is a solvent and A is the solute and as well as for that in which A is solvent and B is solute.

(2) Plot CD shows that Dalton's law of partial pressures is obeyed by the binary solution of components A and B.

(3) EF + EG = EH; and AC and BD correspond to the vapour pressures of the pure solvents A and B respectively.

A) Only 1

B) 2 and 3

C) 1 and 3

D) All Statements are correct

Correct Answer: D

Solution :

Plots AD show vapour pressure of B containing A volatile component. Plot BC show vapour pressure of A containing B volatile component. Plot CD show vapour pressure of liquid solution containing A and B volatile components.

\[P={{P}_{A}}+{{P}_{B}}\]

\[\therefore \]      \[{{E}_{H}}=EF+EG\]