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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

  • Molecularity of Reaction is considered one the most difficult concept.

  • 6 Questions around this concept.

Solve by difficulty

A reaction involving two different reactants can never be

Identify the correct statement.

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.


NH_{4}NO_{2}\rightarrow N_{2}+2H_{2}O (unimolecular)

H_{2}+I_{2}\rightarrow 2HI (bimolecular)

2NO+O_{2}\rightarrow 2NO_{2} (trimolecular)

Molecularity is the theoretical concept. It cannot be zero/non-integer

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Molecularity of Reaction

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