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Question

A catalyst increases the rate of reaction because it:


A
increases the activation energy
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B
decreases the activation energy
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C
decreases collision diameter
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D
increases the temperature coefficient
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Solution

The correct option is B decreases the activation energy
The presence of a catalyst increases the reaction rate (in both forward and reverse reactions) by providing an alternative pathway with lower activation energy.

Activation energy is the minimum energy barrier which the reagents have to cross for the completion of the reaction. If the activation energy is lowered, more reactants can cross that barrier easily and so, the rate of reaction increases.

Chemistry

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