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Class 11 Physics: Kinetic Theory
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MCQs on matter molecular nature, gases behaviour, ideal gas and specific heat capacity of kinetic theory, energy equipartition law and mean free path.

Class 11 Physics: Kinetic Theory
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19 Questions

1. Consider a gas inside a box. It exerts some pressure on its walls. Find this value. GIven that number of molecules per unit volume be 20, mass of each molecule 10-20kg, vx2 = 1m2/s2.
2. Average kinetic energy of a gas depends on which of the following factors?
3. Which of the following is not an assumption of KTG?
4. What is meant by mean free path?
5. What is the number of molecules in 2.24L of SO2 at STP?
6. The behavior of real gases approaches that of ideal gas in which of these following conditions?
7. What is meant by mean free path?
8. A container has 3 gases whose mass ratio is 1:3:5. What is the ratio of mean square speed of the molecules of two gases? Their atomic masses are 20u, 30u & 40u corresponding to the order in which the ratios are given.
9. Which of the following is not an assumption of KTG?
10. Boyle's law can be deduced from kinetic theory. True or False?
11. What is the number of molecules in 3 cubic metre of a gas at 3atm & 27°C?
12. What is the ratio of densities of 2 gases, O2 & N2, having partial pressures in the ratio 2:3?
13. Average kinetic energy of a gas depends on which of the following factors?
14. There are 3 non-interacting ideal gases in a container. The moles of gases 1,2 & 3 are in the ratio 1:3:5. If the total pressure is 54Pa, find the value of partial pressure of gas 1.
15. John Dalton said that atoms are the smallest constituents of elements. True or False?
16. In the given diagram, one graph is of an ideal gas and another is of a real gas. Select the correct option.
17. John Dalton said that atoms are the smallest constituents of elements. True or False?
18. Consider a gas enclosed in a box. Let the walls have an area of 0.01m2. Let's say a few molecules having their x-component of velocity =2m/s, hit a wall parallel to the yz plane. What will be the value of force on the wall in time dt? Let the number of molecules per unit volume be 10 & mass of each molecule be 10-20kg.
19. There are 3 non-interacting ideal gases in a container. The moles of gases 1,2 & 3 are in the ratio 1:3:5. If the total pressure is 54Pa, find the value of partial pressure of gas 1.

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