Assertion: Molecules of air in a room do not all fall and settle on the ground due to gravity.
Reason: Air molecules move with high speed and there is incressant collision of air molecules.

Options

A. (a) If both (`A`) and (`R`) are correct and (`R`) is the correct explanation of (`A`).
B. If both (`A`) and (`R`) are correct, but (`R`) is not the correct explanation of (`A`).
C. If (`A`) is correct, but (`R`) is incorrect.
D. If (`A`) is incorrect, but (`R`) is correct.

Answer

A, B, C, D

Explanation

Speed of gases depend upon molecular mass of gas. Therefore, all ideal gas does not move with same speed.