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Q. No.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: Kinetic Energy of an Ideal Gas |
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NEET - 2013
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What will be the molar specific heat capacity of an isochoric process of a diatomic gas if it has an additional vibrational mode?
\(\begin{align} & {{1}{.}\;\frac{5}{2}{R}}\\ & {{2}{.}\;\frac{3}{2}{R}}\\ & {{3}{.}\;\frac{7}{2}{R}}\\ & {{4}{.}\;\frac{9}{2}{R}} \end{align} \)
\(\begin{align} & {{1}{.}\;\frac{5}{2}{R}}\\ & {{2}{.}\;\frac{3}{2}{R}}\\ & {{3}{.}\;\frac{7}{2}{R}}\\ & {{4}{.}\;\frac{9}{2}{R}} \end{align} \)
Subtopic: Law of Equipartition of Energy |
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Given below are two statements:
| Assertion (A): | The average velocity of the molecules of an ideal gas increases when the temperature rises. |
| Reason (R): | The internal energy of an ideal gas increases with temperature, and this internal energy is the random kinetic energy of molecular motion. |
| 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). |
Subtopic: Types of Velocities |
From NCERT
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Given below are two statements:
| Assertion (A): | The mean free path of gas molecules varies inversely with the density of the gas. |
| Reason (R): | The mean free path varies inversely with the pressure of the gas. |
| 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. |
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The temperature at which the rms speed of atoms in neon gas is equal to the rms speed of hydrogen molecules at \(15^{\circ} \mathrm{C}\) is: (Atomic mass of neon\(=20.2\) u, molecular mass of hydrogen\(=2\) u)
1. \(2.9\times10^{3}\) K
2. \(2.9\) K
3. \(0.15\times10^{3}\) K
4. \(0.29\times10^{3}\) K
Subtopic: Types of Velocities |
74%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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The volume occupied by the molecules contained in \(4.5\) kg water at STP, if the molecular forces vanish away, is:
1. \(5.6\) m3
2. \(5.6\times10^{6}\) m3
3. \(5.6\times10^{3}\) m3
4. \(5.6\times10^{-3}\) m3
1. \(5.6\) m3
2. \(5.6\times10^{6}\) m3
3. \(5.6\times10^{3}\) m3
4. \(5.6\times10^{-3}\) m3
Subtopic: Ideal Gas Equation |
From NCERT
NEET - 2022
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One mole of an equimolar mixture of monoatomic \((He)\) and diatomic \((H_2)\) gases is heated to raise the temperature by \(1\) K under constant pressure. The amount of heat used in this process is (nearly):
1. \(8.3\) J
2. \(16.6\) J
3. \(25\) J
4. \(29\) J
1. \(8.3\) J
2. \(16.6\) J
3. \(25\) J
4. \(29\) J
Subtopic: Specific Heat |
60%
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Select the correct option based on statements below:
| 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). |
Subtopic: Ideal Gas Equation |
68%
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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. \(\frac{T_{H_{2}}}{5}=\frac{T_{\text {He }}}{3}\)
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: Kinetic Energy of an Ideal Gas |
52%
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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: Kinetic Energy of an Ideal Gas |
90%
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