Asubstance is tested with litmus paper. the blue litmus paper remains blue while the red limtus paper remains red. what can you conclude about the substance

It’s neutral with a pH of 7. It’s probably water.

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.