What is the role of acid

solution:
Hydrochloric acid (HCl) is component of gastric juice. It has five functions,

(i) Softening of food,

(ii) Conversion of pepsinogen and prorennin into active forms of pepsin and rennin

(iii) Acidify the food for proper action of pepsin.

(iv) Killing of microoganisms present in food.

(v) Stoppage of action of salivary amylase.