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Science · 2026 · 1 mark
CBSE 2026 · Region 4 · Set 1 · Q9
Assertion (A) : Highest percentage of pesticides is found in tertiary consumers in a food chain.
Reason (R) : Chemicals / pesticides get accumulated progressively at each trophic level.
Official answer
From CBSE’s own marking scheme for this paper.
(A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
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CBSE Class 10 Science past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.