CBSE 2025 · Region 6 · Set 1 · Q17 · 1 mark
Assertion (A) : Carbon and its compounds are our major sources of fuels.
Reason (R) : Most of the carbon compounds on burning release a large amount of heat and light.
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).
Carbon and its CompoundsCombustion, Oxidation, Addition and Substitution ReactionsUnderstandassertion_reasoneasy
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CBSE Class 10 Science past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.