O3(g)+Cl(g)•→O2(g)+ClO(s)•KiClO(g)•+O(g)•→O2(g)+Cl(g)•Kii
O3(g)+O(g)•→202(g)KRate=Ki×Kii
Overall Rate constant =Ki×Kii
=5.2×109×2.6×1010
≈1.4×1020mol−1Ls−1
JEE Main 2016 — Chemistry Physical Chemistry
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) ...(i)
ki=5.2×109Lmol−1s−1
ClO•(g)+O•(g)→O2(g)+Cl•(g) ...(ii)
kii=2.6×1010Lmol−1s−1
The closest rate constant for the overall reaction
O3(g)+O•(g)→2O2(g) is:
Held on 9 Apr 2016 · Verified 6 Jul 2026.
1.4×1020Lmol−1s−1
3.1×1010Lmol−1s−1
5.2×109Lmol−1s−1
2.6×1010Lmol−1s−1
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