Question

Relative lowering in vapour pressure of a solution containing non-volatile solute is the ratio of ____________.

Options

• number of moles of solute to total number of moles of solution

• number of moles of solvent to number of moles of solute

• number of moles of solvent to total number of moles of solution

• number of moles of solute to number of moles of solvent

Answer 1

Relative lowering in vapour pressure of a solution containing non-volatile solute is the ratio of number of moles of solute to total number of moles of solution.

Explanation:

`(("P"_0 - "P")/"P"_0) = "x"_2 = "n"_2/("n"_1 + "n"_2)`