Effect of a catalyst or lower activation energy on the rate

1. A.
   It decreases the enthalpy of reaction.
2. B.
   It increases the enthalpy of reaction.
3. C.
   It decreases the energy of activation of reaction.
4. D.
   It increases the energy of activation of reaction.

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1. A.
   $k$
2. B.
   $A$
3. C.
   $E_a$
4. D.
   $T$

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1. A.
   To increase activation energy of a reaction
2. B.
   To decrease the equilibrium constant of the reaction
3. C.
   To supply energy to the reactants
4. D.
   To decrease activation energy of a reaction

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