Question

The number of collisions and success of those collisions in an elementary reaction can be determined from which part of the rate law.
A.The number of collisions relates to the rate constants for the rate law while the success depends upon the concentration of reactant only.
B.The number of collisions depends on the concentration of the most active reactant only while the success depends upon the rate constant of the reaction.
C.The number of collisions relates to the order of the reaction while success relates to the rate constant experimentally determined for the reaction.
D.The number of collisions & success of reaction can only be determined when the catalyst is used at elevated temperature.

Answer 1

Rate law: The rate of the reaction. $A\to P$ is experimentally found to be given by
$\text{Rate}\propto \left[ \text{A} \right]$
$\text{Rate=K}\left[ A \right]$
$\text{Rate=K}\left[ A \right]$
Rate of reaction depends upon the concentration of reaction and rate of reaction calculated by experiments.

Complete step by step solution:
Collision theory: According to collision theory the reaction is only possible between two species when they are in contact e.g. the reactant species must collide with each other before they react.
So the number of the collision and success of those collisions in an elementary reaction can be determined by the number of collisions related to the order of reaction and the success of those collisions depends upon the rate law experimentally.

So, Option C is the correct answer.

Additional information:
A collision will be effective in producing chemical change only if the species brought together possess a certain minimum value of internal energy, equal to the activation energy of the reaction. The rate of the reaction depends on the frequency of collisions. Factors that increase the rate of a reaction must influence at least one of the following:
a)How often collisions occur. More frequent collisions will mean a faster rate.
b)More effective collisions in terms of collisions occurring with sufficient energy.
c)More effective collisions in terms of collisions occurring with the proper orientation.

Note: To understand the statement, students must be familiar with the definition and expression of the rate law and order of reaction. With this, the knowledge of collision theory also must conclude the answer.