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Q. No.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
1. mass
2. speed
3. momentum
4. kinetic energy
Subtopic: Kinetic Energy of an Ideal Gas |
70%
From NCERT
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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. | 2\(v\) | 2. | \(v\)/2 |
| 3. | \(v\)\(\sqrt2\) | 4. | \(v\)/\(\sqrt2\) |
Subtopic: Types of Velocities |
71%
From NCERT
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Which of the following graphs correctly represents the variation of \(\beta=-\left({\dfrac{dV}{dP}}\right){/}{V}\) with \(P\) for an ideal gas at constant temperature?
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Ideal Gas Equation |
75%
From NCERT
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If the pressure in a closed vessel is reduced by removing some of the gas, how is the mean free path between two gas molecules affected?
| 1. | It increases. |
| 2. | It decreases. |
| 3. | It remains unchanged. |
| 4. | It increases or decreases depending on the nature of the gas. |
Subtopic: Mean Free Path |
67%
From NCERT
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Suppose that the average kinetic energy (translational & rotational) of random molecular motion of helium \(\mathrm{(He})\) at temperature \(T_\mathrm{He}\) is equal to that of hydrogen \(\mathrm{(H_2})\) at temperature \(T_\mathrm{H_2}.\) Then;
| 1. | \(T_\mathrm {H_{2}}=T_\mathrm{H e}\) | 2. | \(\dfrac{T_\mathrm{H_2}}{2}=\dfrac{T_\mathrm{He}}{4}\) |
| 3. | \(5 T_\mathrm{H_2}=3 T_\mathrm{He}\) | 4. | \(\dfrac{T_\mathrm{H_{2}}}{5}=\dfrac{T_\mathrm{{He }}}{3}\) |
Subtopic: Kinetic Energy of an Ideal Gas |
54%
From NCERT
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An increase in the temperature of a gas-filled in a container would lead to:
| 1. | decrease in the intermolecular distance. |
| 2. | increase in its mass. |
| 3. | increase in its kinetic energy. |
| 4. | decrease in its pressure. |
Subtopic: Kinetic Energy of an Ideal Gas |
92%
From NCERT
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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) | \(\dfrac13nm\bar v^2\) |
| (B) | The pressure exerted by an ideal gas | (Q) | \( \sqrt{\dfrac{3 R T}{M}} \) |
| (C) | The average kinetic energy of a molecule | (R) | \( \dfrac{5}{2} R T \) |
| (D) | The total internal energy of a mole of a diatomic gas | (S) | \(\dfrac32k_BT\) |
| (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: Kinetic Energy of an Ideal Gas |
79%
From NCERT
NEET - 2021
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The volume occupied by the molecules contained in \(4.5~\text{kg}\) water at STP, if the molecular forces vanish away, is:
1. \(5.6~\text{m}^3\)
2. \(5.6\times10^{6}~\text{m}^3\)
3. \(5.6\times10^{3}~\text{m}^3\)
4. \(5.6\times10^{-3}~\text{m}^3\)
1. \(5.6~\text{m}^3\)
2. \(5.6\times10^{6}~\text{m}^3\)
3. \(5.6\times10^{3}~\text{m}^3\)
4. \(5.6\times10^{-3}~\text{m}^3\)
Subtopic: Ideal Gas Equation |
From NCERT
NEET - 2022
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Given below are two statements:
| Assertion (A): | The molecules of a monoatomic gas has three degrees of freedom. |
| Reason (R): | The molecules of diatomic gas have five degrees of freedom. |
| 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 |
92%
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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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