Describe the conditions under which a real gas is most likely to behave ideally

The conditions under which a real gas is most likely to behave ideally is at low pressure and hight temperatures.

Explanation:

According to molecular kinetic theory, 1) gas particles (molecules or atoms) occupy a negligible fraction of the total volume of the gas, and 2) the force of attraction between gas molecules is zero.

Those two assumptions constitute the basis for the behavior of a gas and an ideal gas.

The lower the pressure and the higher the temperature the closer those assumptions are valid for real gases.

At low pressure, the particles of the gas will be more separated from each other and so the tiny volume they occupy will be a smaller fraction of the total volume.

At higher temperatures, the particles will have more kinetic energy, which means that they will have larger average speed, and so the forces between the molecules will count less.

So, you conclude that under low pressure and high temperatures a real gas is most likely to behave ideally.