STATEMENT-1   :  Temperature of Real gases often changes when undergoing a free expansion under adiabatic condition whereas that of an ideal gas does not.
STATEMENT-2   : First law of thermodynamics holds for ideal goes only.

In free expansion pressure outside is zero. So, no work done by ideal gas but in real gas work by gas may be done against internal force that exist between molecules.

The first law of thermodynamics is based on the law of conservation of energy, which states that energy cannot be created or destroyed, but can be transferred from one form to another. Thus, it holds for both ideal and real gases.