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

Explanation

(i) Antacids : Chemical substances which removes the excess acid in the stomach and raise the `p^(H)` to appropriate level, e.g., zantac.
(ii) Disinfectants : These are the chemicals substances which kill microorganism or stop their growth but are harmful to living tissues. These are used to kill the micro-organism present in floors, drains toilets , etc., e.g., phenol.
(iii) Enzymes , Enzymes are globular proteins with high molecular mas renging from `15,000` to `1,000,000 g mol^(-1)`, and form colloidal solution in water. A number of reactions that occurs in the body animals and plants to maintain the life process are catalysed by enzymes are termed as biochemical catalysts.