List of top Chemistry Questions on Vapour Pressure of Liquid Solutions

61 g benzoic acid (M = 122 g mol$^{-1}$) dissolved in 500 g benzene. Vapour pressure of pure benzene = 66 torr. Assume complete dimerisation. Calculate vapour pressure of solution.

When a liquid and its vapour are at equilibrium and the pressure is suddenly decreased:

When a liquid and its vapour are at equilibrium and the pressure is suddenly decreased :

State Raoult's law for a solution containing volatile components. Write any two characteristics of a solution which obeys Raoult's law at all concentrations.

Explain why, on addition of 1 mol of KCl to 1 litre of water, the boiling point of water increases, while addition of 1 mol of methyl alcohol to 1 litre of water decreases the boiling point.

{Given below are two statements : Given: Molar masses of C, H, O, Cl are 12, 1, 16 and 35.5 g mol\(^{-1}\) respectively. Statement I: In 30%(w/w) solution of methanol in \( \mathrm{CCl_4} \) (at T K), the mole fraction of \( \mathrm{CCl_4} \) is equal to \(0.33\). Statement II: Mixture of methanol and \( \mathrm{CCl_4} \) shows positive deviation from Raoult's law. In the light of the above statements, choose the correct answer from the option given below :}

Which of the following solutions shows positive deviation from Raoult's law?

The vapor pressures of two liquids \(P\) and \(Q\) are \(80\) torr and \(60\) torr respectively. The total vapor pressure of the solution obtained by mixing \(3\) mol of \(P\) and \(2\) mol of \(Q\) would be:

When air was passed through glass bulb containing 16 g of an organic compound in 100 g of water and then through glass bulb containing only water at the same temperature and then finally through anhydrous CCl₄ glasstube, the loss in mass of glass bulb containing water was 0.052 g and the gain in mass of CCl₄ tube was 1.86 g. Calculate the molecular mass of the organic substance.