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Science · 2026 · 2 marks
CBSE 2026 · Region 3 · Set 1 · Q10
(i) Chlorofluorocarbons (CFCs) have been linked to depletion of ozone layer. In 1987, the United Nations Environment Programme (UNEP) succeeded in…
(i)
Chlorofluorocarbons (CFCs) have been linked to depletion of ozone layer. In $\displaystyle 1987$, the United Nations Environment Programme (UNEP) succeeded in making an agreement. State this agreement.
(ii)
What is the role of ozone in our atmosphere ?
Marking-scheme solution
(i)
To freeze the CFC production at $\displaystyle 1986$ levels.
(ii)
Ozone shields the earth's surface from harmful UV radiations.
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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.