Question

Kinetic theory of an ideal gas is based upon the following assumption(s)

• A. Gases are made of molecules with negligible volume
• B. The gaseous molecules do not possess kinetic energy
• C. The molecules are in constant random motion
• D. Intermolecular forces of attraction are negligible

Hint:

Ideal gas = negligible volume + random motion + no intermolecular forces.

Answer 1

The Correct Option is A, C, D

Step 1: Recall assumptions of kinetic theory.
Ideal gas molecules are treated as point masses → negligible volume. They are always in continuous random motion and collisions are perfectly elastic. Intermolecular forces are assumed negligible.
Step 2: Evaluate statements.
(A) Correct — volume is negligible compared to container volume.
(B) Incorrect — they do possess kinetic energy proportional to temperature.
(C) Correct — random motion is a fundamental assumption.
(D) Correct — attractive forces are negligible for ideal behaviour.
Step 3: Conclusion.
Thus, (A), (C), and (D) are correct assumptions.