Question

what is collision frequency?

Answer 1

During a reaction, the reactants collide with each other to form products.
Therefore, the collision frequency is the average rate at which the collisions between the products take place.
Its unit is similar to that of frequency, $s^{-1}$

Answer 2

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$\small\mathbf\red{{Collision\:frequency\::-}}$ The number of collisions per second per unit volume of the reaction mixture is known as collision frequency .

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