Behaviour of Ideal Gases, Class 11 Physics NCERT Solutions

1. There will be total 10 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. In the case of real gases, the equation of state, PV = RT (where P, V and T are respectively the pressure, volume and absolute temperature), is strictly satisfied only if corrections are applied to the measured pressure P and the measured volume V. The corrections for P and V arise respectively due to

 kinetic energy of molecules and collision of molecules

 size of molecules and expansion of the container

  expansion of the container and intermolecular attraction

  intermolecular attraction and the size of molecules

Question 1 of 10

2. Which one of the following quantities can be zero on an average for the molecules of an ideal gas in equilibrium?

  Speed

  Momentum

  Kinetic energy

 Density

Question 2 of 10

3. Two specific heats of a perfect gas are related by:

 A

 B

 C

 D

Question 3 of 10

4. One mole of any substance at any temperature, pressure or volume always contains ________molecules.

 A

 B

 C

 D

Question 4 of 10

5. Oxygen and nitrogen in two enclosures have the same mass, volume and pressure. The ratio of the temperature of oxygen to that of nitrogen is:

 8/7

 49/64

 1

 7/8

Question 5 of 10

6. When the temperature goes up, the pressure inside a rigid container will _____.

  remain unchanged

 go down

 cause particles to cool

  go up

Question 6 of 10

7. Four moles of an ideal diatomic gas is heated at constant volume from 20° C to 30° C. The molar specific heat of the gas at constant pressure (Cp) is 30.3 Jmol-1K-1 and the universal gas constant (R) is 8.3 Jmol-1K-1. The increase in internal energy of the gas is

 332 J

 80.3 J

 303 J

  880 J

Question 7 of 10

8. A region of the earth’s atmosphere contains n molecules (treated as ideal gas molecules) per unit volume. The temperature of air in the region is T. If k represents Boltzmann’s constant and R represents universal gas constant, the pressure of air in the region is

  RT/n

  nRkT

 nkT

 nT/k

Question 8 of 10

9. The average kinetic energy of translation of a molecule of an ideal gas at temperature T is:

 (1/2) kT

 (5/7) kT

 (3/2) kT

 (7/2) kT

Question 9 of 10

10. Three moles of an ideal monoatomic gas is initially in the state A shown in the adjoining pressure-temperature graph. It is taken to state B without changing its pressure. If R is the universal gas constant, the work done by the gas in this process is

  600 R

 300 R

 400 R

 200 R

Question 10 of 10

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