Practicing Success

Target Exam

CUET

Subject

Chemistry

Chapter

Physical: Chemical Kinetics

Question:

Assertion: Order of a reaction is defined for both elementary as well as complex reactions.

Reason: Slowest step is the rate determining step in complex reactions.

Options:

Assertion and Reason both are correct statements and reason is the correct explanation for assertion.

Assertion and Reason both are correct statements and reason is not the correct explanation for assertion.

Assertion is correct statement but reason is wrong statement.

Assertion is wrong statement but reason is correct statement.

Correct Answer:

Assertion and Reason both are correct statements and reason is the correct explanation for assertion.

Explanation:

Order of a reaction is defined for both elementary as well as complex reactions. 

In complex (reactions occurring in more than one step) reactions, slowest step is the rate determining step because the rate of overall reaction cannot be faster than the slowest step. The molecularity of each step is unique.