It is true that:

It is true that:
  1. A second order reaction is always a multistep reaction
  2. A zero order reaction is a multi-step reaction
  3. A first order reaction is always a single step reaction
  4. A zero order reaction is a single step reaction

Solution

For elementary reaction, order is equal to stoichiometric coefficient. Since reaction having zero stoichiometric coefficient is meaningless therefore, zero order reaction is complex reaction or multi-step reaction.

Asked in: JEE Main 2020 (03 Sep Shift 1)

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