The liquid-vapor equilibrium of a substance can be disturbed by cooling the substance.

true

false

The statement "The liquid-vapor equilibrium of a substance can be disturbed by cooling the substance" is false. The substance must be heated in order to get the vapor phase of that substance.

You would be correct, boiling water does disinfect contamination.    the property of disinfecting means to kill  germs, bacteria and other pathogens or contamination  that might cause an infection or cause a person to become sickly. a couple methods of disinfecting are using soap, other cleaning supplies or by simply "boiling" the contaminate.  the reason why boiling water disinfects certain attributes is because some cells cannot survive the heat and pressure.