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NEET • PHYSICS • KINETIC THEORY OF GASES
Kinetic theory of gases practice · Medium
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Medium
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Remembering
+4 | -1
Which among the following is not a greenhouse gas?
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Correct option: D
Option D () is correct because oxygen is not considered a greenhouse gas.
62
Medium
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Remembering
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The average velocity of molecules of a gas of molecular weight at temperature is
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Correct option: D
zero
Option B () is incorrect because the average velocity of molecules is not zero. The average *speed* is , but the average *velocity* considering direction is zero.
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Medium
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Remembering
+4 | -1
Mean kinetic energy per degree of freedom of gas molecules is
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Correct option: C
The correct answer is C because the mean kinetic energy per degree of freedom of gas molecules is given by (1/2)kT, where k is the Boltzmann constant and T is the absolute temperature.
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Medium
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Understanding
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The molecules of an ideal gas at a certain temperature have
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Correct option: B
Only kinetic energy
Option B (Only kinetic energy) is correct because ideal gas molecules are assumed to have no intermolecular forces, hence no potential energy.
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Medium
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Application
+4 | -1
Total rotational kinetic energy of two moles of rigid diatomic gas is
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Correct option: D
Option D () is correct because the rotational kinetic energy of a diatomic gas is given by , where f=2 for rotational degrees of freedom and n=2 moles.
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Medium
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Application
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An ideal monoatomic gas of given mass is heated at constant pressure. In this process, the fraction of supplied heat energy used for the increase of the internal energy of the gas is
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Correct option: B
Option B () is correct because for a monoatomic gas at constant pressure, the ratio of change in internal energy to the heat supplied is 3/5.
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Medium
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Understanding
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The translatory kinetic energy of gas per is
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Correct option: B
Option B () is correct because it represents the translational kinetic energy per unit mass, where M is the molar mass.
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Medium
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Understanding
+4 | -1
The time average of the kinetic energy of one molecule of a gas taken over a long period of time
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Correct option: B
Is proportional to the absolute temperature of the gas
Option B (Is proportional to the absolute temperature of the gas) is correct because the average kinetic energy of a gas molecule is directly proportional to the absolute temperature.
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Medium
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Analyzing
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An ideal gas in a closed container is slowly heated. As its temperature increases, which of the following statements are true?
A. The mean free path of the molecules decreases.
B. The mean collision time between the molecules decreases.
C. The mean free path remains unchanged.
D. The mean collision time remains unchanged.
A. The mean free path of the molecules decreases.
B. The mean collision time between the molecules decreases.
C. The mean free path remains unchanged.
D. The mean collision time remains unchanged.
View answer and explanation
Correct option: A
B and C
Option A (B and C) is correct because as temperature increases, the mean collision time decreases and the mean free path remains unchanged in a closed container.
Revision notes and key takeaways
Review KINETIC THEORY OF GASES in your textbook or class notes, then use this set to check your understanding.
Showing 61-69 of 69 questions