Question:
Which of the following does not influence the rate of reaction?
Which of the following does not influence the rate of reaction?
Show Hint
Molecularity is a theoretical constant for an elementary reaction and is not a variable that can be changed to affect the rate.
Updated On: Apr 16, 2026
- Molecularity of the reaction
- Temperature of the reaction
- Concentration of the reactants
- Nature of the reactants
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Factors affecting reaction rate are temperature, concentration, nature of reactants, surface area, and catalyst. Molecularity is a theoretical concept.
Step 2: Detailed Explanation:
• (A) Molecularity: It is the number of molecules/atoms/ions colliding in an elementary step. It is a property of the reaction mechanism and does not determine the rate; it is not an influencing factor that can be changed. • (B) Temperature: Increasing temperature increases the rate. • (C) Concentration: Increasing concentration of reactants generally increases the rate. • (D) Nature of reactants: Ionic reactions are faster than covalent, etc.
Step 3: Final Answer:
Molecularity does not influence the rate of reaction, which corresponds to option (A).
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