2. Suppose you have prepared a compound which is reported in the literature to have a pale blue color. When dissolving the substance in hot solvent prior to
recrystallization, the resulting solution is blue. Should you use decolorizing charcoal
before allowing the hot solution to cool?

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.

Its the second one nonmetals are moldable and easily shaped