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NEET levelSingle correct optionDifficulty 1 of 3ck117

In the Arrhenius equation $k = A e^{- E_{a} / RT}$ , the pre-exponential factor $A$ has the same units as

Athe activation energy $E_{a}$
Bthe gas constant $R$
Cthe rate constant $k$
Dthe reaction rate only for a zero-order reaction

Answer: C

The exponential term is dimensionless, so

A

must carry the units of

k

. These depend on the order, for example

s^{- 1}

for first order.

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