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Science — AI-generated practice question

AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.

Q1. [2] medium initial-understanding
What is the role of hydrochloric acid in our stomach?
Generated by claude-sonnet-4-6 · 2026-06-10 02:56 · grounding rag
Model Answer

Hydrochloric acid (HCl) in the stomach performs two main roles:

  1. It creates an acidic medium which is necessary for the activation and proper functioning of the protein-digesting enzyme pepsin.
  2. It kills harmful bacteria and pathogens that may enter the stomach with food, preventing infection.

Source: Life Processes, Chapter 5, Section 5.2.4

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Explanation

The textbook directly states that HCl "creates an acidic medium which facilitates the action of the enzyme pepsin." The passage also hints at another function ("What other function do you think is served by the acid?") — which is killing germs. Examiners expect both points for full 2 marks. Mention pepsin by name; that shows precise recall and earns marks.

Previous-year CBSE Grade 10 board exam questions, organised by subject and chapter, each with a model answer — free to read and print.