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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…
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
(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 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.