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.
Subtopic: Â Kinetic Energy of an Ideal Gas |
Â 90%
From NCERT
Hints

In a vessel, the gas is at a pressure $$P$$. If the mass of all the molecules is halved and their speed is doubled, then the resultant pressure will be:
1. $$2 P$$
2. $$P$$
3. $$\frac{P}{2}$$
4. $$4 P$$
Subtopic: Â Kinetic Energy of an Ideal Gas |
Â 64%
From NCERT
NEET - 2013
Hints

Suppose that the average kinetic energy (translational & rotational) of random molecular motion of helium ($$He$$) at temperature $$T_{He}$$ is equal to that of hydrogen ($$H_2$$) at temperature $$T_{H_2}$$. Then,
1. $$T_{H_{2}}=T_{H e}$$
2. $$\frac{T_{H_2}}{2}=\frac{T_{He}}{4}$$
3. $$5 T_{H_2}=3 T_{He}$$
4. $$\frac{T_{H_{2}}}{5}=\frac{T_{\text {He }}}{3}$$
Subtopic: Â Kinetic Energy of an Ideal Gas |
Â 52%
From NCERT
Hints

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

Subtopic: Â Kinetic Energy of an Ideal Gas |
Â 70%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Match Column - I and Column - II and choose the correct match from the given choices.

 Column - I Column - II (A) root mean square speed of gas molecules (P) $$\frac13nm\bar v^2$$ (B) the pressure exerted by an ideal gas (Q) $$\sqrt{\frac{3 R T}{M}}$$ (C) the average kinetic energy of a molecule (R) $$\frac{5}{2} R T$$ (D) the total internal energy of 1 mole of a diatomic gas (S) $$\frac32k_BT$$

 (A) (B) (C) (D) 1. (Q) (P) (S) (R) 2. (R) (Q) (P) (S) 3. (R) (P) (S) (Q) 4. (Q) (R) (S) (P)
Subtopic: Â Kinetic Energy of an Ideal Gas |
Â 76%
From NCERT
NEET - 2021
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A cubic vessel (with faces horizontal + vertical) contains an ideal gas at NTP. The vessel is being carried by a rocket which is moving at a speed of  in the vertical direction. The pressure of the gas inside the vessel as observed by us on the ground:

 1 remains the same because  $$500$$ $$\mathrm{ms^{-1}}$$ is very much smaller than $$v_{rms}$$ of the gas. 2 remains the same because the motion of the vessel as a whole does not affect the relative motion of the gas molecules and the walls. 3 will increase by a factor equal to $$\Big(\frac{v_{rms}^2+(500)^2}{v_{rms}^2}\Big)$$where $$v_{rms}^2$$ was the original mean square velocity of the gas. 4 will be different on the top wall and bottom wall of the vessel.

Subtopic: Â Kinetic Energy of an Ideal Gas |
Â 66%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch