Question

An increase in the concentration of the reactants of a reaction leads to change in :

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• A. collision frequency
• B. threshold energy
• C. heat of reaction
• D. activation energy

Answer 1

The correct option is A collision frequency

The number of collisions that takes place per second per unit volume of the reaction mixture is known as collision frequency (Z)

As the concentration of reactants increases the number of reactant molecules per unit volume increases which increases the collision frequency.

$Z\propto$ number of reactant molecules per unit volume