What is the
role of a catalyst in a catalysed reaction
[MP PMT 1996; Pb. PMT 2000;UPSEAT 2001,02]
A
Lowers
the activation energy
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B
Increases
the activation energy
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C
Affects
the free energy change
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D
Affects
the enthalpy change
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Solution
The correct option is A
Lowers
the activation energy
All substance have
average energy and before the reaction occurs energy of the reactant should be
higher than the average energy. We also know that catalyst lower the activation
energy. Therefore, rate of reaction is increased.