Q. 515.0( 1 Vote )

Why molecularity is applicable only for elementary reactions and order is applicable for elementary as well as complex reactions?

Answer :

Molecularity is determined theoretically whereas order is a practical quantity. Molecularity is applicable only for elementary reactions as they are the single step reactions and the rate depends on the concentration of each molecule, whereas in case of complex reactions there are multiple reactions involved and thus molecularity holds no meaning. Molecularity is the collisions of reactant molecules and to increase the rate it requires a proper orientation at the time of collisions which is only possible in less molecules.In complex reactions order is determined by the slow step and it can also be easily determined in the elementary reactions as well.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Interactive quiz on arrhenius equationFREE Class
Interactive Quiz on Integrated Rate equation58 mins
Arrhenius equation & Collision TheoryFREE Class
Integrated Rate EquationFREE Class
Factors influencing Rate of Chemical Reaction45 mins
Questions based on Chemical Reaction57 mins
Questions Based on Factors influencing Rate of Chemical Reaction41 mins
Learn Rate of a Chemical Reaction65 mins
15 Concept Builder Questions of Chemical Bonding - Reminding 11th46 mins
Chemical Reaction of PhenolFREE Class
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses