For a gas at a particular temperature on an average, the quantity which remains same for all molecules is (a) velocity (b) momentum (c) kinetic energy (d) angular momentum

Answer: (c). Average KE per molecule = 3/2kT depends only on temperature. Velocity and momentum are vectors that average to zero; their magnitudes differ from molecule to molecule. So the answer is (c) kinetic energy.

For a gas at a particular temperature on an average, the quantity… | MHT CET 2025 (22 Apr, Shift 1)

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Molecular Speeds & Maxwell Distribution

For a gas at a particular temperature on an average, the quantity which remains same for all molecules is

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Answer: (c)

Average KE per molecule $= \frac{3}{2}kT$ depends only on temperature.
Velocity and momentum are vectors that average to zero; their magnitudes differ from molecule to molecule.
So the answer is (c) kinetic energy.

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