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JEE Main levelOne or more correct optionsDifficulty 2 of 3ev085

Which of the following statements about the chlorine-catalysed destruction of ozone (; ) are correct?

  1. AChlorine atom is regenerated in the cycle.
  2. B is an intermediate.
  3. CThe net change is .
  4. DOne Cl atom destroys exactly one ozone molecule.

Answer: A, B, C

Cl is used in step 1 and regenerated in step 2, so it is a catalyst and ClO is an intermediate. Adding the steps gives . Since Cl is regenerated, one Cl atom can destroy a very large number of ozone molecules, so the last statement is false.
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