Question:
An increase in the concentration of the reactants of a reaction leads to a change in
An increase in the concentration of the reactants of a reaction leads to a change in
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More reactant molecules per unit volume means more collisions per second, without changing the energy barrier.
Updated On: Nov 12, 2026
- heat of reaction
- threshold energy
- collision frequency
- activation energy
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept
Raising the concentration puts more molecules in each unit volume, so they collide more often.
Step 2: Which quantity changes
The collision frequency goes up, and so does the rate.
Step 3: Which quantities stay the same
The heat of reaction depends only on initial and final states. Threshold energy and activation energy are fixed for the reaction unless a catalyst or new path is used.
Final Answer:
An increase in reactant concentration changes the collision frequency. \[ \boxed{\text{(C) }\text{collision frequency}} \]
Raising the concentration puts more molecules in each unit volume, so they collide more often.
Step 2: Which quantity changes
The collision frequency goes up, and so does the rate.
Step 3: Which quantities stay the same
The heat of reaction depends only on initial and final states. Threshold energy and activation energy are fixed for the reaction unless a catalyst or new path is used.
Final Answer:
An increase in reactant concentration changes the collision frequency. \[ \boxed{\text{(C) }\text{collision frequency}} \]
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