The gas 'A' is having very low reactivity reaches to stratosphere. It is non-toxic and non-flammable but dissociated by UV-radiations in stratosphere. The intermediates formed initially from the gas 'A' are:

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Cl· + CF2Cl. Gas A is a chlorofluorocarbon (Freon) such as CF2Cl2: unreactive, non-toxic, non-flammable, photodissociated in the stratosphere. UV cleaves the weakest C-Cl bond homolytically, giving Cl(.) and .CF2Cl as the initial intermediates.

The gas 'A' is having very low reactivity reaches to stratosphere. It is non-toxic and non-flammable but dissociated by UV-radiations in stratosphere. The intermediates formed initially from the gas 'A' are:

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