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The reaction of ozone with oxygen atoms in the presence of chlorine atoms can occur by a two step process shown below: O_3(g)+ Cl^•→ O_2(g)+ ClO^•(g)…

JEE Main 2016 — Chemistry Physical Chemistry

2016mcqhard

The reaction of ozone with oxygen atoms in the presence of chlorine atoms can occur by a two step process shown below:

O3(g)+Cl•→O2(g)+ClO•(g){O}_{3}(g)+{\mathrm{Cl}}^{•}\rightarrow {O}_{2}(g)+{\mathrm{ClO}}^{•}(g)O3​(g)+Cl•→O2​(g)+ClO•(g) ...(i)

ki=5.2×109Lmol−1s−1{k}_{i}=5.2\times {10}^{9} L mo{l}^{-1} {s}^{-1}ki​=5.2×109Lmol−1s−1

ClO•(g)+O•(g)→O2(g)+Cl•(g){\mathrm{ClO}}^{•}(g)+{O}^{•}(g)\rightarrow {O}_{2}(g)+{\mathrm{Cl}}^{•}(g)ClO•(g)+O•(g)→O2​(g)+Cl•(g) ...(ii)

kii=2.6×1010Lmol−1s−1{k}_{ii}=2.6\times {10}^{10} L mo{l}^{-1} {s}^{-1}kii​=2.6×1010Lmol−1s−1

The closest rate constant for the overall reaction

O3(g)+O•(g)→2O2(g){O}_{3}(g)+{O}^{•}(g)\rightarrow 2{O}_{2}(g)O3​(g)+O•(g)→2O2​(g) is:

Official previous-year question

Held on 9 Apr 2016 · Verified 6 Jul 2026.

Options

  1. A

    1.4×1020Lmol−1s−11.4\times {10}^{20} L mo{l}^{-1} {s}^{-1}1.4×1020Lmol−1s−1

  2. B

    3.1×1010Lmol−1s−13.1\times {10}^{10} L mo{l}^{-1} {s}^{-1}3.1×1010Lmol−1s−1

  3. C

    5.2×109Lmol−1s−15.2\times {10}^{9} L mo{l}^{-1} {s}^{-1}5.2×109Lmol−1s−1

  4. D

    2.6×1010Lmol−1s−12.6\times {10}^{10} L mo{l}^{-1} {s}^{-1}2.6×1010Lmol−1s−1

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