Question

State a condition under which a biomolecular rxn is kinetically 1st order rxns

For what type of rxn order and molecularity have same value

Answer 1

In a biomolecular reaction, if one of the reacting species is taken in excess such that its concentration remains practically unchanged during the course of reaction, the biomolecular reaction is kinetically 1st order reaction.

For elementary reactions ( simple reactions occurring in one step), the molecularity and order are usually the same.