Q6 / 196 · NTA Abhyas (NEET) 2020 · Chemistry · Chemical Kinetics

Ozone depletion takes place as
2O3(g)→3O2(g)
Step-1 O 3 (g)  ↔ K   O 2 (g) + [O]
Step-2 O 3 (g) + [O] → k 2O 2 (g) (slow)
Order of the reaction will be

  • Correct answer
    A
    1
  • B
    2
  • C
    3
  • D
    Unpredictable

Solution

Rate =k[O3][O] ...(i) (for RDS)
K=[O2][O][O3] …(i)
[O]=K[O3][O2] (from step 1)
From equation (i) and (ii)
Rate =kK[O3]2[O2]-1
Order =2-1=1

Hence, the correct answer is option: 'A'.

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