EASYVIT - VITEEE 2025
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Molecularity of reaction - Practice Questions & MCQ
Edited By admin | Updated on Sep 18, 2023 18:35 AM | #JEE Main
Quick Facts
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Molecularity of Reaction is considered one the most difficult concept.
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8 Questions around this concept.
Solve by difficulty
A reaction involving two different reactants can never be
Identify the correct statement.
Higher molecularity (>3) reactions are rare due to:
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In the following questions two or more options may be correct.
For a complex reaction ______________.
(i) order of an overall reaction is the same as molecularity of the slowest step.
(ii) order of an overall reaction is less than the molecularity of the slowest step.
(iii) order of an overall reaction is greater than molecularity of the slowest step.
(iv) molecularity of the slowest step is never zero or non-integer.
Concepts Covered - 1
Molecularity of Reaction
The number of reacting species (atoms, ions or molecules) taking part in an elementary reaction which must collide simultaneously in order to bring about a chemical reaction is Molecularity.
Description:
$\mathrm{NH}_4 \mathrm{NO}_2 \rightarrow \mathrm{~N}_2+2 \mathrm{H}_2 \mathrm{O}$ (unimolecular)
$\mathrm{H}_2+\mathrm{I}_2 \rightarrow 2 \mathrm{HI}$ (bimolecular)
$2 \mathrm{NO}+\mathrm{O}_2 \rightarrow 2 \mathrm{NO}_2$ (trimolecular)
Molecularity is the theoretical concept. It cannot be zero/non-integer
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