It is possible to liquefy a gas

Is is possible to liquefy a gas at any temperature?

Is it possible to liquefy a gas at any temperature?

Is it possible to liquefy a gas at any condition?

One of the assumptions of kinetic theory of gases states that "there is no force of attraction between the molecules of a gas". How far is this statement correct ? Is it possible to liquefy an ideal gas ? Explain.

One of the assumptions of kinetic theory of gases states that "there is no force of attraction between the molecules of a gas". How far is this statement correct ? Is it possible to liquefy an ideal gas ? Explain.

It is easier to liquefy a gas with higher critical temperature-explain.

Why is it not possible to liquefy an ideal gas?