Target Exam

CUET

Subject

Chemistry

Chapter

Physical: Solutions

Question:

Which of the following formulas represents Raoult's law for a solution containing non-volatile solute?

Options:

$P_{\text{solute}} = P^\circ_{\text{solute}} \cdot \chi_{\text{solute}}$

$P = K_{\text{H}} \cdot \chi$

$P_{\text{Total}} = P_{\text{solvent}}$

$P_{\text{Total}} = P^\circ_{\text{solvent}} \cdot \chi_{\text{solvent}}$

Correct Answer:

$P_{\text{Total}} = P^\circ_{\text{solvent}} \cdot \chi_{\text{solvent}}$

Explanation:

The correct answer is Option (4) → $P_{\text{Total}} = P^\circ_{\text{solvent}} \cdot \chi_{\text{solvent}}$ ##

According to Raoult's law, the vapour pressure of a solution of a non-volatile solute is equal to the vapour pressure of the pure solvent at that temperature multiplied by its mole fraction.