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MHT CET Medical202625 April 2026Evening ShiftChemistryEnvironmental ChemistryActual

Which of the following is responsible for depletion of ozone layer in stratosphere?

Options

  1. AN ₂ O ₅
  2. BNO ₃
  3. CNO ₂
  4. DNO

Correct answer

D. NO

Step-by-step solution

Nitric oxide ( NO ) is responsible for the depletion of the ozone layer in the stratosphere. It is emitted from the exhaust systems of supersonic jet aeroplanes and reacts with ozone to form nitrogen dioxide and oxygen. The reaction is given by: NO (g) + O ₃(g) NO ₂(g) + O ₂(g) Thus, NO acts as a catalyst in the depletion of ozone. Answer: NO

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