Q. Which of the following statement is true?
A) The relative lowering of vapour pressure of a solution is equal to the mole fraction of the solute present in the solution.
B) Passage of solute molecules towards solution side through semipermeable membrane is osmosis.
C) The boiling point of solution is always lower than the solvent.
D) The boiling point of a liquid is the temperature at which its vapour pressure becomes equal to 260 mm.
Explanation
(a)
$\frac{p{^\circ} - p_{s}}{p{^\circ}} = X_{1}$ (mole fraction of solute )
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.