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Chemical Kinetics
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Arrhenius equation and activation energy
NEET level
Single correct option
Difficulty 1 of 3
ck118
A catalyst increases the rate of a reaction by
A
raising the energy of the reactants so that more of them cross the barrier
B
increasing the activation energy of the reverse reaction only
C
lowering the enthalpy of the products
D
providing a path of lower activation energy without changing
Δ
H
of the reaction
Answer: D
A catalyst offers an alternative pathway with a smaller
E
a
for both directions. The initial and final states are unchanged, so
Δ
H
is the same.
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