JEE Advanced · PhysicsEasy
Which of the following assumptions is made in the kinetic theory of ideal gases?
- A.Collisions between molecules are inelastic
- B.The volume of molecules is significant
- C.There are intermolecular forces of attraction
- D.Collisions between molecules are perfectly elastic
Show correct answer & step-by-step solution
Correct answer: D — Collisions between molecules are perfectly elastic
Solution
- The kinetic theory of ideal gases assumes that gas particles are point masses with negligible volume and no intermolecular forces.
- A core postulate of this theory is that all collisions between gas molecules, and between molecules and container walls, are perfectly elastic.
- In a perfectly elastic collision, the total kinetic energy of the system is conserved.
- Hence the answer is (D).
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