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Gaseous State Three Marks Questions

11th Standard

    Reg.No. :


Time : 01:00:00 Hrs
Total Marks : 30
    10 x 3 = 30
  1. A sample of gas at 15°C at 1 atm. has a volume of 2.58 dm3. When the temperature is raised to 38°C at 1 atm does the volume of the gas increase? If so, calculate the final volume.

  2. A sample of gas has a volume of 8.5 dm3 at an unknown temperature. When the sample is submerged in ice water at 0 °C, its volume gets reduced to 6.37 dm3. What is its initial temperature?

  3. Of two samples of nitrogen gas, sample A contains 1.5 moles of nitrogen in a vessel of volume of 37.6 dm3 at 298K, and the sample B is in a vessel of volume 16.5 dm3 at 298K. Calculate the number of moles in sample B.

  4. Hydrochloric acid is treated with a metal to produce hydrogen gas. Suppose a student carries out this reaction and collects a volume of 154.4 x 10-3 dm3 of a gas at a pressure of 742 mm of Hg at a temperature of 298 K. What mass of hydrogen gas (in mg) did the student collect?

  5. It takes 192 sec for an unknown gas to diffuse through a porous wall and 84 sec for N2 gas to effuse at the same temperature and pressure. What is the molar mass of the unknown gas?

  6. Give the graphical representation of Boyle's law.

  7. How does the volume of a gas vary with temperature at constant pressure? Explain with the help of a plot between volume is temperature.

  8. Explain the term 'Boyle's point.' Mention is significance.

  9. Show how the molar volume of a real and ideal gas are related to each other?

  10. Mention the application of Dalton's law.


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