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Q.

Which of the following is/are true for an elementary reaction?
I. Reaction takes place in a single step.
II. Reaction takes place in multiple steps.
III. Molecularity is equal to order of the reaction.
IV. Molecularity is not equal to order of the reaction.

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a

I & II

b

I & III

c

I, II, & III

d

I, II, III, & IV

answer is B.

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Detailed Solution

Molecularity is equal to order of the reaction.
It is also called as elementary / Simple / Single Step Reaction as they take place in a single step without the formation of
any intermediate.
Example:
AB+C→AC+B

Question Image

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.

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