Which among the following is an example of zero order reaction?

Which among the following is an example of zero order reaction?
  1. Decomposition of $\mathrm{N}_{2} \mathrm{O}$ in presence of catalyst
  2. Inversion of $\mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11}$
  3. Hydrolysis of $\mathrm{CH}_{3} \mathrm{COOCH}_{3}$
  4. Decomposition of $\mathrm{N}_{2} \mathrm{O}_{5}$

Solution

Because only the $\mathrm{N}_{2} \mathrm{O}$ molecules on the catalyst surface react, the reaction rate is independent of the total concentration of $\mathrm{N}_{2} \mathrm{O}$. Therefore, the reaction follows zero order kinetics.

Asked in: MHT CET 2020 (15 Oct Shift 1)

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