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A: Ozone depletion potential is maximum ...

A: Ozone depletion potential is maximum in CFC's.
R: CFC looses active chlorine.

A

If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).

B

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)

C

If Assertion is true statement but Reason is false, then mark (3)

D

If both Assertion and Reason are false statements, then mark (4).

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding ozone depletion potential (ODP) and chlorofluorocarbons (CFCs), we will break down the information provided step by step. ### Step-by-Step Solution: 1. **Understanding Ozone Depletion Potential (ODP)**: - Ozone Depletion Potential refers to the ability of a substance to deplete the ozone layer in the stratosphere. CFCs are known to have a high ODP. 2. **Identifying Chlorofluorocarbons (CFCs)**: - CFCs are compounds that contain carbon, chlorine, and fluorine. A common example is dichlorodifluoromethane (CF2Cl2). 3. **Mechanism of Ozone Depletion**: - When CFCs are released into the atmosphere, they undergo photochemical reactions when exposed to ultraviolet (UV) light from the sun. - This reaction leads to the breakdown of CFCs, producing chlorine radicals (Cl•). 4. **Role of Chlorine Radicals**: - The chlorine radicals generated from CFCs are highly reactive and can attack ozone (O3) molecules. - The reaction between chlorine radicals and ozone leads to the formation of oxygen (O2) and more chlorine radicals, which can continue to deplete more ozone. 5. **Continuous Cycle of Ozone Depletion**: - The process continues as each chlorine radical can destroy thousands of ozone molecules before being deactivated. This cycle illustrates why CFCs have a maximum ozone depletion potential. 6. **Conclusion**: - The assertion states that "Ozone depletion potential is maximum in CFCs," which is true. - The reason states that "CFC loses active chlorine," which is also true and explains why CFCs have a high ODP. - Therefore, both the assertion and the reason are true, and the reason correctly explains the assertion. ### Final Answer: Both assertion and reason are true, and the reason is the correct explanation of the assertion.
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