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Science · 2026 · 1 mark
CBSE 2026 · Region 1 · Set 3 · Q9
Assertion (A): Ozone at higher levels of atmosphere is a product of UV radiation acting on oxygen molecule. Reason (R): The higher energy of UV…
Assertion (A) : Ozone at higher levels of atmosphere is a product of UV radiation acting on oxygen molecule.
Reason (R) : The higher energy of UV splits apart some molecular $\displaystyle \mathrm{O}_{2}$.
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.