Question

Select the incorrect statement about ideal gas.

• A. Molecules of a gas are in incessant random motion colliding against one another and with the walls of the container
• B. The gas is not isotropic and the constant (1/3) in equation $P=\left(1/3\right)p{v^2}_{rms}$ is result of this propert
• C. The time during which a collision lasts is negotiable compared to the time of free path between collisions.
• D. There is no force of interaction between molecules among themselves or between molecules and the wall except during collision.

Answer 1

The correct option is B The gas is not isotropic and the constant (1/3) in equation $P=\left(1/3\right)p{v^2}_{rms}$ is result of this propert

A) correct As molecules in a gas are loosely bound and remain in state of continuous motion

B) incorrect Isotropic property says that the various properties of a material are independent of direction hence the constant $\left(\frac{1}{3}\right)$ is the result of the assumption that the velocity of molecule is same in all three axis x, y, z.

C) correct Collisions are momentary while time of free movement can be infinite.

D) correct For ideal gas being attractive or repulsive forces are zero and change of momentum takes place during collision