CBSE Class 10 Science 2021 Term 1 Solved Paper

Question : 35

Total: 60

Assertion (A): : Hydrochloric acid helps in the digestion of food in the stomach.
Reason (R): Hydrochloric acid creates an acidic medium to activate protein digesting enzymes.

Both (A) and (R) are true and (R) is the correct explanation of (A).
Both (A) and (R) are true but (R) is not the correct explanation of (A).
(A) is true, but (R) is false.
(A) is false, but (R) is true.

Solution:

Hydrochloric acid helps in the digestion of food in the stomach as it creates the acidic conditions necessary for the action of the protein digesting enzyme. It activates pepsin to act on proteins. It also destroys the structure of proteins so that the enzymes can digest them easily. It also gets mixed with food and kills the bacteria present in food.

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