Select the incorrect statement about ideal gas. - Vidyadip

MCQ

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.
✓
The gas is not isotropic and the constant $(1/3)$ in equation $P = (1/3)\rho v^2_{rms}$ is result of this property
C
The time during which a collision lasts is negligible 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

Correct option: B.

The gas is not isotropic and the constant $(1/3)$ in equation $P = (1/3)\rho v^2_{rms}$ is result of this property

b
$B)$ 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 $x, y, z$

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