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NEET levelSingle correct optionDifficulty 1 of 3ck120

In the expression $k = A e^{- E_{a} / RT}$ , the factor $e^{- E_{a} / RT}$ represents

Athe fraction of collisions with the correct orientation
Bthe fraction of molecular collisions having energy equal to or greater than $E_{a}$
Cthe fraction of molecules having energy less than $E_{a}$
Dthe total number of collisions per second

Answer: B

The Boltzmann factor gives the fraction of molecules (collisions) whose energy equals or exceeds the threshold

E_{a}

. Orientation requirements and collision frequency are contained in

A

.

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