A) only one reacting species is involved in the rate determining step
B) the order and the molecularity of slowest step are equal to one
C) the molecularity of the reaction is one and order is zero
D) both molecularity and order of the reaction are one
Correct Answer: B
Solution :Slowest step of a reaction is called the rate determining step. If in this step only one reactant is involved, the reaction is called unimolecular. For such reactions, the order and molecularity of slowest step are equal to one.
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