Question

3. Concerns over the depletion of stratospheric ozone first surfaced in the 1960s and 1970s. Describe what are the natural processes and anthropogenic emissions that causes stratospheric ozone depletion. Explain with the aid of chemical equations how does anthropogenic chlorine (Cl) in the atmosphere cause the depletion of stratospheric ozone.

Answer 1

was was ozone hole. summer season In 1960-70 atmospheric scientists working in Antarctica reported about depletion of ozone layer commonly known as ozone hele. It found that unique set of conditions responsibie for the In nitrogen dioxide and methane react with chlorine mononide And chlorine atoms forming chlorine sinks preventing much in winter, special ozone layer, where as beype of clouds are formed clouds over Antarctica. These provide surface which chlorine nitrate formed it hydrolysed to form hypochlorons acids. Hoc ig s OH hypochlorous acid g) + deg on ho chcg) my ad cg ggt 03 egg doigg & O2 Ioan + og d'ego +02c9). ig lo + No conosco eg) 19 lot CH & CH₃ + HCl caj 29) eg czone depletion by CFCS (chloroflurro coben) - (F2 cheg) uy it cradle egg egg Now d will reacts with Oz. as shown above Ozone depletion by methane- 3 CH4 + 202 3 CH₂ = 0 +3140 formaldehyde. NO. Hoeg) +031g Noleg) + O219). Al the above gases are produced from industries which react easily with zone to depletion. Ozone depletion by cause