Question

Which of the following is/are true for an elementary reaction?

• A. Reaction takes place in a single step.
• B. Reaction takes place in multiple steps.
• C. Molecularity is equal to order of the reaction.
• D. Molecularity is not equal to order of the reaction.

Answer 1

Answer: (A), (C)

Molecularity is equal to order of the reaction.

Elementary / Simple / Single Step Reaction
These reactions take place in a single step Without formation of
any intermediate.
Intermediate formed during the course of a reaction but not present in the overall balanced equation .

Example:
$AB+C\to AC+B$
For these type of reactions
Molecularity is equal to order of the reaction.
Stoichiometric coefficient of any reactant is equal to order w.r.t.
that reactant