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Science · 2022 · 3 marks
CBSE 2022 · Region 4 · Set 3 · Q11
In 1987, the United Nations Environment Programme (UNEP) forged an agreement to freeze the production of a certain chemical to year 1986 level. Name…
In $\displaystyle 1987$, the United Nations Environment Programme (UNEP) forged an agreement to freeze the production of a certain chemical to year $\displaystyle 1986$ level. Name the chemical and the manufacturing companies in which this chemical was being mostly used. In what way this chemical damages (i) the upper layers of the atmosphere and ultimately (ii) the organisms on the earth.
Marking-scheme solution
Chlorofluoro carbons (CFCs)
Aerosols / Refrigerants / fire extinguishers
i) Chorofluoro carbon chemicals damage ozone layer / depletion of ozone layer
(ii)
UV radiations reaching earth's surface can cause damage to organisms / skin cancer in humans.
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