Question

Which one of the following is the wrong assumption of kinetic theory of gases?

• A. Momentum and energy always remain conserved.
• B. Pressure is the result of elastic collision of molecules with the container's wall.
• C. Molecules are separated by great distances compared to their sizes.
• D. All the molecules move in straight line between collision and with same velocity.

Answer 1

Answer: (D)

All the molecules move in straight line between collision and with same velocity.

Answer 2

Molecules move very fast in all directions in a straight line by colliding with each other but with different velocity.

So, the correct option is (D): All the molecules move in straight line between collision and with same velocity.