RMS Speed of Gas Molecules NEET Questions

Physics - Kinetic Theory of Gases

RMS Speed of Gas Molecules MCQ Questions


1.
The RMS speed of a gas molecule is given by the formula vrms = √(3kBT / m). What does kB represent in this equation?
A.
Boltzmann constant
B.
Universal gas constant
C.
Molar mass of the gas
D.
Avogadro's number
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ANSWER :
A. Boltzmann constant
2.
How does the RMS speed of gas molecules change if the temperature is doubled?
A.
It remains the same
B.
It doubles
C.
It halves
D.
It quadruples
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ANSWER :
B. It doubles
3.
Which of the following gases will have the highest RMS speed at a given temperature?
A.
Hydrogen (Hâ‚‚)
B.
Oxygen (Oâ‚‚)
C.
Nitrogen (Nâ‚‚)
D.
Carbon dioxide (COâ‚‚)
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ANSWER :
A. Hydrogen (Hâ‚‚)
4.
The RMS speed of gas molecules is directly proportional to the square root of which quantity?
A.
Temperature
B.
Pressure
C.
Volume
D.
Molar mass of the gas
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ANSWER :
A. Temperature
5.
What is the effect on the RMS speed of a gas if its molar mass is quadrupled, keeping temperature constant?
A.
It doubles
B.
It halves
C.
It quadruples
D.
It reduces to half
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ANSWER :
B. It halves
6.
If the temperature of a gas is increased from 300 K to 1200 K, the RMS speed of its molecules will:
A.
It remains the same
B.
It is doubled
C.
It is quadrupled
D.
It is halved
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ANSWER :
C. It is quadrupled