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Science (086) — AI-generated practice question

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

Q1. [1] medium exam-ready
Assertion (A): Rancidity in food can be slowed down by storing food in airtight containers. Reason (R): Airtight containers reduce the contact of food with oxygen, thereby preventing the oxidation of fats and oils. (A) Both A and R are true and R is the correct explanation of A. (B) Both A and R are true but R is not the correct explanation of A. (C) A is true but R is false. (D) A is false but R is true.
  1. A Both A and R are true and R is the correct explanation of A.
  2. B Both A and R are true but R is not the correct explanation of A.
  3. C A is true but R is false.
  4. D A is false but R is true.
Generated by claude-sonnet-4-6 · 2026-06-26 00:53 · grounding rag
Model Answer

(A) Both A and R are true and R is the correct explanation of A.

Storing food in airtight containers limits oxygen exposure, which directly prevents oxidation of fats and oils — the cause of rancidity. Hence, R correctly explains A.

Explanation

Rancidity is caused by oxidation of fats/oils in food. Airtight containers reduce oxygen contact, slowing this oxidation. Since R directly and correctly explains why A is true, option (A) is the right choice. Remember: whenever the reason logically and correctly justifies the assertion, choose option (A).

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