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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 $\displaystyle 1987$, the United Nations Environment Programme (UNEP) succeeded in making an agreement. State this agreement.(ii)What is the role of ozone in our atmosphere ?
(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 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.