Explain how oxides of nitrogen are introduced directly into the strato

1.	Explain how oxides of nitrogen are introduced directly into the stratosphere?
Answer» Solution : (i) Nitrogen oxides are introduced DIRECTLY into the stratosphere by the supersonic jet aircraft ENGINES in the FORM of exhaust gases. (ii) These oxides are released by combustion of fossil fucls and nitrogen fertilisers. Inert nitrous ovide in the stratosphere is photochemically converted into more reactive nitric Oxide. (iii) Oxides of nitrogen catalyses the decomposition of ozone and are themselves regenerated. Ozone gets depleted as FOLLOWS: `NO+ O_(3) RARR NO_(2) + O_(2)` `O_(2) overset( hv) rarr O + O` `NO_(2) + o rarr NO + 2O` Thus NO is regenerated in the chain reaction

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