Question

(a) What do you mean by bio-catalyst? Give an example. [1×3 = 3]
(b) Which catalyst is used in the preparation of oxygen in the laboratory from potassium chlorate?
(c) What happens to the pH of the solution obtained by the reaction of a weak base and strong acid.

Answer 1

Bio-catalysts are the living chemical substances that modifies, intensifies or initiates a chemical reaction in a living body.

• Enzymes in our body are perfect examples of Bio-catalyst. Amylase, Hectokinase etc are examples of bio catalysts.
• (b) Manganese di-oxide ( MnO2 ) is used in the preparation of oxygen(O2) in the laboratory from potassium Chloride.
• (c) On reacting a weak base and a strong acid, the pH of the solution obtained remains less than 7.