The internal energy of an ideal gas depends upon:

State whether the following statements are True or False:
$(i)$ Attractive or repulsive forces act between molecules of an ideal gas.
$(ii)$ The potential energy of an ideal gas is zero.
$(iii)$ Molecules of all gases are the same in size.
$(iv)$ Molecules of an ideal gas are perfectly elastic spheres.

Which of the following statements is/are not an assumption of the kinetic theory for an ideal gas?

Kinetic theory of gases was put forward by

Select the incorrect statement about an ideal gas.

$A$ gas in an airtight container is heated from $25^{\circ}C$ to $90^{\circ}C$. The density of the gas will