A chemical reaction in which the rate of reaction is directly proportional to the first power of the concentration of the reacting substance is called:
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Correct answer: D
Explanation
The correct answer is Option 4 i.e. first order reaction.
A chemical reaction in which the rate of reaction is directly proportional to the first power of the concentration of the reacting substance is called a first-order reaction. In such reactions, the rate of reaction depends linearly on the concentration of one reactant.