List of top Chemistry Questions on Vapour Pressure of Liquid Solutions asked in CUET (UG)

{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.