# The ratio of the average translatory kinetic energy of He gas molecules to ${\mathrm{O}}_{2}$ gas molecules is: 1. $\frac{25}{21}$ 2. $\frac{21}{25}$ 3. $\frac{3}{2}$ 4. 1

Subtopic:  Kinetic Energy of an Ideal Gas |
75%
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

Heat is  associated with:

 1 kinetic energy of random motion of molecules. 2 kinetic energy of orderly motion of molecules. 3 total kinetic energy of random and orderly motion of molecules. 4 kinetic energy of random motion in some cases and kinetic energy of orderly motion in other cases.

Subtopic:  Kinetic Energy of an Ideal Gas |
56%
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

Two closed containers of equal volume are filled with air at pressure ${\mathrm{P}}_{0}$ and temperature ${\mathrm{T}}_{0}$. Both are connected by a narrow tube. If one of the containers is maintained at temperature ${\mathrm{T}}_{0}$ and the other at temperature T, then new pressure in the container will be:

1. $\frac{2{\mathrm{P}}_{0}\mathrm{T}}{\mathrm{T}+{\mathrm{T}}_{0}}$

2. $\frac{{\mathrm{P}}_{0}\mathrm{T}}{\mathrm{T}+{\mathrm{T}}_{0}}$

3. $\frac{{\mathrm{P}}_{0}\mathrm{T}}{2\left(\mathrm{T}+{\mathrm{T}}_{0}\right)}$

4. $\frac{\mathrm{T}+{\mathrm{T}}_{0}}{{\mathrm{P}}_{0}}$

Subtopic:  Ideal Gas Equation |
56%
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

The rms speed of the molecules of an enclosed gas is $$v$$. What will be the rms speed if the pressure is doubled, keeping the temperature constant?

 1 $$v \over 2$$ 2 $$v$$ 3 $$2v$$ 4 $$4v$$
Subtopic:  Types of Velocities |
76%
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

What is the average thermal energy of a helium atom at room temperature ($$27^{\circ}\mathrm{C}$$)?

 1 $$11 . 21 \times 10^{- 20} \text{J}$$ 2 $$3 . 09 \times 10^{- 16} \text{J}$$ 3 $$6 . 21 \times 10^{- 21} \text{J}$$ 4 $$5 . 97 \times 10^{- 19} \text{J}$$
Subtopic:  Law of Equipartition of Energy |
64%
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

When an ideal gas is compressed adiabatically, its temperature rises: the molecules on an average have more kinetic energy than before. The kinetic energy increases:

 1 because of collisions with moving parts of the wall only. 2 because of collisions with the entire wall. 3 because the molecules get accelerated in their motion inside the volume. 4 because of the redistribution of energy amongst the molecules.
Subtopic:  Kinetic Energy of an Ideal Gas |
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

1 mole of an ideal gas is contained in a cubical volume V, ABCDEFGH at 300 K (figure). One face of the cube (EFGH) is made up of a material which totally absorbs any gas molecule incident on it. At any given time:

 1 the pressure on EFGH would be zero. 2 the pressure on all the faces will be equal. 3 the pressure on EFGH would be double the pressure on ABCD. 4 the pressure on EFGH would be half that on ABCD.

Subtopic:  Kinetic Energy of an Ideal Gas |
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

Diatomic molecules like hydrogen have energies due to both translational as well as rotational motion. From the equation in kinetic theory, $$PV = \dfrac{2}{3}E$$$,$ $$E$$ is:

 1 the total energy per unit volume. 2 only the translational part of energy because rotational energy is very small compared to translational energy. 3 only the translational part of the energy because during collisions with the wall, pressure relates to change in linear momentum. 4 the translational part of the energy because rotational energies of molecules can be of either sign and its average over all the molecules is zero.

Subtopic:  Kinetic Energy of an Ideal Gas |
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

The graph between volume and temperature in Charle's law is?
1. an ellipse
2. a circle
3. a straight line
4. a parabola

Subtopic:  Ideal Gas Equation |
88%
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

The mean free path for a gas, with molecular diameter $$d$$ and number density $$n,$$ can be expressed as:
1. $$\frac{1}{\sqrt{2} n \pi \mathrm{d}^2}$$
2. $$\frac{1}{\sqrt{2} n^2 \pi \mathrm{d}^2}$$
3. $$\frac{1}{\sqrt{2} n^2 \pi^2 d^2}$$
4. $$\frac{1}{\sqrt{2} n \pi \mathrm{d}}$$

Subtopic:  Mean Free Path |
81%
From NCERT
NEET - 2020
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints