PYQ Vault
EbooksTutor

Relative lowering of vapour pressure of a solution of given mass of solute in water

The same question, asked 3 times: 16 May 2023 S1*, 21 Apr 2025 S2*, 22 Apr 2025 S2. Every wording below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    16 May 2023 S1

    99
    Calculate the relative lowering of vapour pressure of solution containing 46 g of non-volatile solute in 162 g of water at 20°C20°C. [Molar mass of nonvolatile solute =46 g mol−1= 46\,\text{g mol}^{-1}]

    Tap an option to check your answer.

  2. Question 2

    21 Apr 2025 S2

    99
    Calculate the relative lowering of vapor pressure of solution containing 0.56 g nonvolatile solute in 100 g water [molar mass of solute =60 g mol−1= 60\text{ }g{\text{ }mol}^{- 1} ]

    Tap an option to check your answer.

  3. Question 3

    22 Apr 2025 S2

    65
    Calculate the relative lowering of vapour pressure of solution containing 3 g urea in 50 g water. [molar mass of urea =60 g mol−1= 60\text{ }g{\text{ }mol}^{- 1} ]

    Tap an option to check your answer.