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Question

What causes an increase in effective collisions without increasing average energy?

A
An increase in the reactant concentration
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B
An increase in the temperature
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C
A decrease in pressure
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D
Catalysts
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Solution

The correct option is A An increase in the reactant concentration
As the concentration of the reactant increases, effective collision between the reactant molecules also increases. And thus, the reaction rate also increases. It is the main principle of the collision theory.
Option A is the correct answer.

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