MolSynapsequestion bank
MolSynapse / Question bank / Environmental Chemistry / Ozone depletion and greenhouse effect
JEE Main levelSingle correct optionDifficulty 2 of 3ev074

HCFC-22 () has a much lower ozone depletion potential than . The best reason is that

  1. Ait is insoluble in water and persists for centuries
  2. Bit contains more chlorine per molecule
  3. Cit does not absorb any radiation
  4. Dits C-H bond lets it be attacked by OH radicals in the troposphere, so little of it reaches the stratosphere

Answer: D

The hydrogen atom provides a site for reaction with OH radicals in the lower atmosphere, so most of the compound is destroyed before reaching the stratosphere. Fully halogenated CFCs lack this pathway.
Practice Environmental Chemistry More on Ozone depletion and greenhouse effect
Previous questionNext question

More questions on Ozone depletion and greenhouse effect