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

Explanation

(i) Antacids : The chemical substances which neutralize excess acid released by gastric juices and give relief from acid, indigestion, heart burns and gastric ulcers are known as antacids e.g., `NaHCO_(3)`, (Baking soda), magnesium hydroxide etc.
(ii) Disinfectants : These are chemicals which kill micro-organisms but are not safe for contact with living tissues. e.g., 1% Phenol.
(iii) Enzymes : Enzymes are proteins which act as catalysts in many biochemical reactions. These are the important group of globular proteins which act as essential biological catalysts and are specific in action .e.g., Amylase, maltase.