Question-07 What is the order and molecularity respectively for the elementary reaction given below?
O_3(g)+O(g)\rightarrow2O_2(g) if r=k[O_3][O]
(A) 2^{nd} and 1
(B) 1^{st} and 2
(C) 2^{nd} and 2
(D) 1^{st} and 1
Answer : (C)
Explanation:
The reaction is
O_3(g) + O(g) \rightarrow 2O_2(g)Rate = k[O₃][O]
∴ Order of reaction = 1 + 1 = 2
Molecularity is the number of reactant molecules involved in elementary reaction.
Hence, Molecularity = 2.