What is order and molecularity of following reaction? NO_ 2(g) + NO_ 2(g) 2NO_ (g) + O_ 2(g)

MHT CET 2025 Chemistry question

What is order and molecularity of following reaction?

(A)order 1, molecularity 2
(B)order 2, molecularity 2Correct
(C)order 2, molecularity 3
(D)order zero, molecularity 2

Answer: (B)

Solution

The reaction occurs in a single elementary step in which two molecules collide, so the molecularity (number of reacting species in the elementary step) is 2 (bimolecular). For an elementary reaction the rate law follows the stoichiometry:

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Question ID VK-101176