Pick out the wrong statement?

The expression for the work done for a reversible polytropic process can be used to obtain the expression for work done for all processes, except reversible ________ process?

Ferromagnetic materials owe their properties to ________ inner sub-shells?

The refrigerant freon-12 is chemically________?

________ prohibits the use of alcohols directly in petrol engines?

Out of two equilibrium curves, first one lies above the diagonal and the second lies below the diagonal in the x-y plot. It means that separation by distillation is________?