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Q. No.Given below are two statements:
Assertion (A):
Absolute zero temperature is also the zero energy temperature of gas molecules.
Reason (R):
At absolute zero temperature, the molecules of gas come to rest, hence possess no energy of any form.
1.
Both (A) and (R) are true and (R) is the correct explanation of (A).
2.
Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.
(A) is true but (R) is false.
4.
Both (A) and (R) are false.
Subtopic: Kinetic Energy of an Ideal Gas |
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Given below are two statements:
| Assertion (A): | The root mean square velocity of molecules of gas having a Maxwellian distribution of velocities is higher than their most probable velocity at any temperature. |
| Reason (R): | A very small number of molecules of a gas which possess very large velocities increase root mean square velocity, without affecting the most probable velocity. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Types of Velocities |
67%
From NCERT
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Given below are two statements:
| Assertion (A): | A gas can be liquified at any temperature by an increase of pressure alone. |
| Reason (R): | On increasing pressure, the temperature of gas decreases. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Ideal Gas Equation |
65%
From NCERT
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Given below are two statements:
| Assertion (A): | The ratio \(C_p\over C_v\) is more for helium gas than for hydrogen gas. |
| Reason (R): | Atomic mass of helium is more than that of hydrogen. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Specific Heat |
76%
From NCERT
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Given below are two statements:
| Assertion (A): | The root mean square and most probable speeds of the molecules in a gas are the same. |
| Reason (R): | The Maxwell distribution for the speed of molecules in a gas is symmetrical. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Types of Velocities |
83%
From NCERT
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Given below are two statements:
| Assertion (A): | For a gas, \(\gamma\)=1.286, the number of degrees of freedom of the molecules of this gas is 7. |
| Reason (R): | The relation between \({\gamma} =1+{2\over n}\) |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Law of Equipartition of Energy |
84%
From NCERT
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Given below are two statements:
| Assertion (A): | The molar heat capacity of the gas can have any value from \(-\infty\) to \(\infty\). |
| Reason (R): | The molar heat capacity of the gas for the isothermal process is \(\infty\). |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Specific Heat |
64%
From NCERT
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Given below are two statements:
| Assertion (A): | Molecules of air in a room do not all fall and settle on the ground due to gravity. |
| Reason (R): | Air molecules have very high speeds and undergo incessant collisions. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Types of Velocities |
77%
From NCERT
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Given below are two statements:
| Assertion (A): | Evaporation of water which makes "Rains" a possibility to occur at the surface of water |
| Reason (R): | The molecules which are very fast i.e., having speed several times the average speed can escape from water surface. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Types of Velocities |
78%
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Given below are two statements:
| Assertion (A): | The internal energy of a real gas is a function of both, temperature and volume. |
| Reason (R): | Internal K.E. depends on temperature and internal P.E. depends on volume. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Kinetic Energy of an Ideal Gas |
53%
From NCERT
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