Question

The number of molecules that react with each other in an elementary reaction is a measure of the:

• A. activation energy of the reaction
• B. stoichiometry of the reaction
• C. molecularity of the reaction
• D. order of the reaction

Hint:

Molecularity is the number of reactant molecules that collide in an elementary step to undergo a reaction.

Answer 1

The Correct Option is C

To solve the problem, we need to determine what the number of molecules that react with each other in an elementary reaction measures.

1. Understanding Elementary Reactions:
An elementary reaction is a single-step chemical reaction where molecules collide and react directly to form products. The number of molecules that come together in this step defines a specific characteristic of the reaction.

2. Identifying the Term:
The number of molecules that react in an elementary reaction is referred to as the molecularity of the reaction. Molecularity indicates whether the reaction is unimolecular (one molecule), bimolecular (two molecules), or termolecular (three molecules).

Final Answer:
The number of molecules that react with each other in an elementary reaction is a measure of the molecularity.