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JEE Main 201910 JanuaryEvening Shift
Exam
JEE Main
Year
2019
Date
10 January
Shift
Evening Shift
Subject
Chemistry
Chapter
Environmental Chemistry

JEE Main 2019 · 10 January · Evening Shift · Chemistry · Environmental Chemistry

The reaction that is not involved in the ozone layer depletion...

The reaction that is not involved in the ozone layer depletion mechanism in the stratosphere is

Options

  1. ACH4+2O2→CO2+2H2O{CH}_{4} + 2{O}_{2} \to {CO}_{2} + 2{H}_{2}O
  2. BClO∙(g)+O(g)→C∙l(g)+O2(g)Cl\overset{∙}{O}\left(g\right) + O\left(g\right) \to \overset{∙}{C}l{\left(g\right)}^{} + {O}_{2}\left(g\right)
  3. CCF2Cl2(g)→uvC∙l(g)+C∙F2Cl(g){CF}_{2}{Cl}_{2}\left(g\right)\overset{uv}{\to}\overset{∙}{C}{l}^{}\left(g\right) + \overset{∙}{C}{F}_{2}Cl\left(g\right)
  4. DHOCl(g)→h(nu)O∙H(g)+Cl∙(g)HOCl\left(g\right)\overset{h ( nu )}{\to}\overset{∙}{O}{H}^{}\left(g\right) + \overset{∙}{Cl}\left(g\right)

Correct answer

A. CH4+2O2→CO2+2H2O{CH}_{4} + 2{O}_{2} \to {CO}_{2} + 2{H}_{2}O

Step-by-step solution

Methane oxidation is responsible for the majority of ozone formation in troposphere. Hence, the process is not involved in the ozone layer depletion mechanism in the stratosphere.
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