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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
Environmental Chemistry

NTA Abhyas 2020 · 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. AClO⋅(g)+(O)g→C⋅l(g)+O2(g)Cl{\overset{⋅}{O}}_{( g )} + ( O{)}_{g} \to \overset{⋅}{C}{l}_{( g )} + {O}_{2 ( g )}
  2. BHOCl(g)→O⋅H(g)+C⋅l(g)HOC{l}_{( g )} \to \overset{⋅}{O}{H}_{( g )} + \overset{⋅}{C}{l}_{( g )}
  3. CCH4+2O3→3CH2=O+2H2OC{H}_{4} + 2{O}_{3} \to 3C{H}_{2} = O + 2{H}_{2}O
  4. DCF2Cl2(g)→hvC⋅l(g)+C⋅F2Cl(g)C{F}_{2}C{l}_{2 ( g )}\overset{hv}{→}\overset{⋅}{C}{l}_{( g )} + \overset{⋅}{C}{F}_{2}C{l}_{( g )}

Correct answer

C. CH4+2O3→3CH2=O+2H2OC{H}_{4} + 2{O}_{3} \to 3C{H}_{2} = O + 2{H}_{2}O

Step-by-step solution

As CH4C{H}_{4} is not present in stratosphere moreover it cannot diffuse like CFCs into stratosphere from atmosphere.
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