Explain the following terms giving one example of each type: (i) Antacids, (ii) Disinfectants, (iii) Enzymes

I) Antacids are medicines that neutralize stomach acid, e.g. brioschi NaHCO3.
II) Disinfectants are chemicals used to kill micro-organisms, applied only to non-living objects like floors and drains, e.g. 1% solution of phenol.
III) Enzymes are biological catalysts which speed up the rate of biochemical reactions, e.g. amylase.