An ideal gas is filled in a vessel,then

What is conserved during the elastic collision of gas molecules? Explain.

What are macroscopic quantities and microscopic quantities?

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.

In a thermodynamic system,the working substance is an ideal gas. Its internal energy is in the form of

Most of the real gases behave like an ideal gas at