Oxygen molecules at temperature T have the same r.m.s. speed as helium molecules at 300 K. What is the temperature T ?
Chapter 9 : KINETIC THEORY OF GASES

Quiz
•
Physics
•
12th Grade - University
•
Hard
shanii pok
Used 58+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
106 K
600 K
850 K
2400 K
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The volume of an ideal gas is V when its pressure is p. The r.m.s. speed of the gas molecules is proportional to
pV
p/V
√pV
√p/V
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The pressure of an ideal gas in a vessel is 1.5×105 Pa when the temperature is 350 K. What is the number of gas molecules per unit volume?
1.7×1020 m-3
1.4×1021 m-3
1.2×1022 m-3
3.1×1025 m-3
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The pressure of an ideal gas in a vessel is p. The gas is heated at constant volume until the r.m.s. speed of the gas molecules is doubled. what is the new pressure of the gas?
√2p
2p
3p
4p
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which of the following is not an assumption of the kinetic theory of gases?
Gas molecules move with the same speed, known as the r.m.s. speed
Gas molecules are in constant free random motion
Collisions between gas molecules are perfectly elastic
The size of a gas molecule is negligible compared to the distance between gas molecules
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which statement about the internal energy U of a fixed mass of an ideal gas of pressure p, volume V and temperature T is correct?
U ∝ p
U ∝ pV
U ∝ V
U ∝ √T
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
The molecular speed distribution of a gas is shown in the figure above. Which of the statements is correct?
The mean speed is V'
The r.m.s. speed is greater than V'
The maximum number of molecules is n'
More than half of the number of molecules have speeds less than V'
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