The pressure exerted by a gas enclosed within a room is due to:
1. | collisions of the gas molecules with the walls of the room. |
2. | repulsive force between molecules of the gas. |
3. | weight of the molecules of the gas. |
4. | angular momentum of the molecules. |
Hydrogen gas is contained in a vessel and the RMS speed of the gas molecules is \(v\). The gas is heated isobarically so that its volume doubles, then it is compressed isothermally so that it returns to the same volume. The final RMS speed of the molecules will be:
1. | \(v\) | 22. | \(v\)/2 |
3. | \(v\)\(\sqrt2\) | 4. | \(v\)/\(\sqrt2\) |
1. | \(T_{H_{2}}=T_{H e}\) | 2. | \(\dfrac{T_{H_2}}{2}=\dfrac{T_{He}}{4}\) |
3. | \(5 T_{H_2}=3 T_{He}\) | 4. | \(\dfrac{T_{H_{2}}}{5}=\dfrac{T_{{He }}}{3}\) |
The process on an ideal gas as shown in the figure given below is:
1. isothermal
2. isobaric
3. isochoric
4. none of these
1. | mass of the gas |
2. | kinetic energy of the gas |
3. | number of moles of the gas |
4. | number of molecules in the gas |
1. | \(v_a>v_{rms}\) |
2. | \(v_a<v_{rms}\) |
3. | \(v_a=v_{rms}\) |
4. | \(v_{rms}\) is undefined |
Which of the following parameters is the same for molecules of all gases at a given temperature?
1. mass
2. speed
3. momentum
4. kinetic energy
Assertion (A): | As a gas bubble rises from the bottom of a lake, its volume decreases. |
Reason (R): | As the gas bubble rises from the bottom of a lake, the pressure of the gas within decreases. |
1. | (A) is True but (R) is False. |
2. | (A) is False but (R) is True. |
3. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
4. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |