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Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

1. Polyhalogens
2. Ferrocene
3. Fullerenes
4. Freons

Correct answer: Freons

Solution

Freons (chlorofluorocarbons) release chlorine radicals in the atmosphere, which catalytically destroy ozone molecules, leading to ozone layer depletion.

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