While a mixture of trichloromethane and ethoxyethane results in a negative deviation, a mixture of water and ethanol positively deviate,  though both are examples of azeotropes.
Solutions that do not follow it over a wide range of concentrations cannot be classified as perfect. Those that obey it can be classified as ideal, while others deviate from it based on their activity coefficient relative to one. While a mixture of trichloromethane and ethoxyethane results in a negative deviation, a mixture of water and ethanol positively deviate,  though both are examples of azeotropes. FTP, name this law, which states that the component vapor pressure of a  substance is equivalent to its mole fraction times its vapor pressure in pure form.
Solutions that do not follow it over a wide range of concentrations cannot be classified as perfect.
Raoult’s Law