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Question

Mention the factors that affect the rate of a chemical reaction.

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Solution

Following factors affect the rate of a chemical reaction.

(a) Nature of reactants: Ionic substances react more rapidly than covalent bonds because ions produced after dissociation are immediately stable for reaction.

(b) The Concentration of reactants: Rate of reaction increases when the concentration of reactants is increased.

(c) Temperature: Generally the rate of reaction increases on increasing the temperature.

(d) The surface area of the reactants: Rate of reaction increases with the increase in surface area of the reactants. That is why the powdered form of reactants is preferred than their granular form.

(e) Catalyst: Presence of catalyst also affects the rate of reaction. It decreases the activation energy by forming a reaction intermediate and hence lowers the potential energy barrier. So, the rate of reaction increases.


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