Balance the equation, and identify the type of reaction (synthesis, decomposition, etc.). Reaction Type
1. KClO3 KCl + O2 1.
2. KBr + F2 KF + Br2 2.
3. S8 + F2 SF6 3.
4. Na2SO4 + Pb(NO3)2 NaNO3 + PbSO4 4.
5. C3H8 + O2 CO2 + H2O 5.
6. Zn + HCl ZnCl2 + H2 6.
7. FeCl3 + Na2CO3 Fe2(CO3)3 + NaCl 7.
8. Na + H2O NaOH + H2 8.
9. C2H6 + O2 CO2 + H2O 9.
10. HgO Hg + O2 10.
11. CaCl2 + Na3PO4 NaCl + Ca3(PO4)2 11.
12. N2O5 + H2O HNO3 12.
13. Mg + CuCl2 MgCl2 + Cu 13.

Yes it would be a physical change.

Anions are negative charged ions

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.