NEET Chemistry Chemical Kinetics Questions Solved


The chemical reaction, 2O3 3O2 proceeds as follows;

O3 O2 + O .....(Fast)

O+O3  2O2 ....(Slow)

The rate law expression should be:

(a) r = K[O3]2

(b) r = K[O3]2[O2]-1

(c) r = K[O3][O2]

(d) unpredictable

(b) For slow step, rate = K[O3][O2]  ... (i)

Also for equilibrium Kc=[O][O2] / [O3]   .....(ii)

[O] = Kc[O3]/[O2]   .. (iii)

By Eqs. (iii) and (i) the  intermediate [O] is eliminated as rate = K.Kc[O3][O3]/[O2] = K'[O3]2 /[O2]

Difficulty Level:

  • 10%
  • 68%
  • 16%
  • 8%
Crack NEET with Online Course - Free Trial (Offer Valid Till September 18, 2019)