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Partial pressures and composition of a mixture of gases (Dalton's law)

This type of question, asked 4 times: 26 Jul 2022, 29 Jul 2022, 31 Jan 2023, 7 Apr 2025. All 5 questions below, oldest first.

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  1. Question 1

    26 Jul 2022

    52
    A mixture of hydrogen and oxygen contains 40%40\% hydrogen by mass when the pressure is 2.2 bar. The partial pressure of hydrogen is bar. (Nearest Integer)

  2. Question 2

    26 Jul 2022

    141
    A 10 g10\text{ }g mixture of hydrogen and helium is contained in a vessel of capacity 0.0125 m30.0125{\text{ }m}^{3} at 6 bar and 27∘C27^{\circ}C. The mass of helium in the mixture is g. (nearest integer) Given: R=8.3JK−1 mol−1R = 8.3JK^{- 1}{\text{ }mol}^{- 1} (Atomic masses of HH and HeHe are 1u1u and 4u4u, respectively)

  3. Question 3

    29 Jul 2022

    141
    'xx' g of molecular oxygen (O2)\left( O_{2} \right) is mixed with 200 g200\text{ }g of neon (Ne)(Ne). The total pressure of the non-reactive mixture of O2O_{2} and NeNe in the cylinder is 25 bar. The partial pressure of NeNe is 20 bar at the same temperature and volume. The value of 'xx' is ____. [Given: Molar mass of O2=32 g mol−1O_{2} = 32\text{ }g{\text{ }mol}^{- 1}. Molar mass of Ne=20 g mol−1Ne = 20\text{ }g{\text{ }mol}^{- 1}]

  4. Question 4

    31 Jan 2023

    58
    The total pressure of a mixture of non-reacting gases X(0.6 g)X(0.6\text{ }g) and Y(0.45 g)Y(0.45\text{ }g) in a vessel is 740 mm740\text{ }mm of HgHg. The partial pressure of the gas XX is mmmm of HgHg. (Nearest Integer) (Given: molar mass X=20X = 20 and Y=45 g mol−1Y = 45\text{ }g{\text{ }mol}^{- 1} )

  5. Question 5

    7 Apr 2025

    34
    At the sea level, the dry air mass percentage composition is given as nitrogen gas : 70.0, oxygen gas : 27.0 and argon gas : 3.0. If total pressure is 1.15 atm , then calculate the ratio of followings respectively : (i) partial pressure of nitrogen gas to partial pressure of oxygen gas (ii) partial pressure of oxygen gas to partial pressure of argon gas (Given : Molar mass of N, O and Ar are 14, 16, and 40 g mol−140\text{ }g{\text{ }mol}^{- 1} respectively)

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