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Assertion (A): Animals will… (Class 10 Science 2025, Q20)

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ScienceCBSE Class 10 · Board exam 2025, set 31/2/1 · 1 mark · Assertion-reason

CBSE Class 10 Science 2025: question 20

Set in the CBSE Class 10 board exam of 2025, paper 31/2/1, section A, question 20, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q20 · 1 mark · Assertion-reasonCompetency-basedLife Processes

Assertion (A): Animals will not get energy if they eat (consume) coal as food.

Reason (R): Specific enzymes are needed for the breakdown of a particular food.

  1. (A)Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
  2. (B)Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
  3. (C)Assertion (A) is true, but Reason (R) is false.
  4. (D)Assertion (A) is false, but Reason (R) is true.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2025 board paper, set 31/2/1.

Hints

Open one hint at a time and try again before the next.

Hint 1

What is needed to digest any food?

Hint 2

Do animals have an enzyme for coal?

Step-by-step solution

Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.

  1. Animals cannot digest coal, so they get no energy from eating it. A is true.

  2. Each kind of food is broken down by its own specific enzymes. R is true.

  3. Animals have no enzyme that can break down coal, which is why they get no energy from it. R explains A: (A).

    1 mark

Answer: (A)

Where the marks are

  • Both true and R correctly explains A, option (A) (1 mark)

Revise the chapter

  • Chapter: Life Processes (notes, formulas, where marks are lost and every past question)
Practise this chapterBoard-style questions from Life Processes, one at a time, marked against the answer key and marking points.Back to the full paper2025 board paper, set 31/2/1: every question, by section.

The question is transcribed from the official paper; figures are described in words. The solution, hints and chapter tag are ours. Spotted an error? Write tosupport@questionbuddy.in.