Q.

Molecularity of a reaction is equal to the total number of                            

A. products formed in the elementary step
B. reactants taking part in elementary step
C. reactants and products in the elementary step
D. reactants and products in the final step
Answer» B. reactants taking part in elementary step
Explanation: molecularity of a reaction is equal to the total number of reactants taking part in an elementary step. it is defined as the number of molecules or ions that participate in the rate determining step.
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