Home › UP Board Class 10 › Science › Our Environment › Chlorofluorocarbons (CFCs) damage the ozone laye…
Chlorofluorocarbons (CFCs) damage the ozone layer because they:
AReflect UV back into space (option)
BRelease chlorine atoms that catalytically destroy ozone
CAbsorb visible light
DAdd nitrogen to the air
Answer & Solution
Correct answer: B. Release chlorine atoms that catalytically destroy ozone
1. CFCs rise to the stratosphere and decompose under UV.
2. Released chlorine reacts with ozone, breaking it into O₂.
3. A single Cl atom can destroy many ozone molecules.
_Source: NCERT Class 10 Science, Ch 13 "Our Environment", §13.2.1_
Related questions
The maximum concentration of accumulated pesticides in a food chain is usually found inWhich one of the following is a non-biodegradable waste?Substances that are broken down by biological processes are said to beThe chemicals mainly responsible for the depletion of the ozone layer areThe ozone layer in the upper atmosphere is important because itThe progressive increase in the concentration of harmful, non-degradable chemicals at eachFood chains generally have only three or four steps becauseThe flow of energy in a food chain is