Give one example of a reaction where order and molecularity are equal.

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Solution

Elementary reactions have same value of order and molecularity.
Elementary reaction is chemical reaction in which one or more reactants reacts directly to form product in a single step with single transition state.
Example,
Decomposition of Hydrogen peroxide{Both order and molecularity are one)
$H_{2} O_{2} (s o l u t i o n) \to H_{2} O + \frac{1}{2} O_{2}$

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Similar questions

In any unimolecular reaction ......... .
(a) only one reacting species is involved in the rate determining step
(b) the order and the molecularity of slowest step are equalto one
(c) the molecularity of the reaction is one and order is zero
(d) both molecularity and order of the reaction are one

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