NEET Chemistry Rate of Reaction MCQ Question
Which of the following statements about the rate of reaction are correct?
The instantaneous rate of reaction can be defined as the average rate over an infinitesimally small time interval.
The rate of a zero-order reaction depends directly on the concentration of the reactants.
For a first-order reaction, the time taken for 90% completion is equal to the time taken for 99% completion.
The rate constant for a reaction can vary with temperature and affects the speed at which equilibrium is reached.
Correct Answer
Detailed Explanation
Statement A is correct as it describes the instantaneous rate based on the average rate at a very small time interval. Statement B is incorrect because zero-order reactions are independent of reactant concentration. Statement C is incorrect as the time for 99% completion is actually twice that for 90% completion in first-order kinetics. Statement D is true but not directly related to the instantaneous rate concept.
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