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Question

Select the correct statement regarding activation energy:

A
Activation energy may be greater than the heat of a reaction
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B
Activation energy is less than the threshold energy
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C
Rate of reaction is inversely proportional to activation energy
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D
All of these
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Solution

The correct option is D All of these

Threshold energy is the energy of the transition state that is always greater than the activation energy.

Activation energy is the energy difference between the energy of the transition state and the energy of the reactant.

Heat of a reaction is the energy difference between the product and the reactant,
Heat of the reaction =Energy of productEnergy of reactant

According to Arrhenius equation,
k=AeEaRT
The rate constant is inversely related to activation energy.

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