Question

Which of the following is 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. Both (a) and (c)

Answer 1

The correct option is D Both (a) and (c)

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.