NEET Chemistry Rate of Reaction MCQ Question
Which of the following statements about the rate of reaction is correct?
The rate of reaction is a positive quantity derived from the change in concentration over time.
The rate of reaction is always proportional to the stoichiometric coefficients of the reactants.
The rate of reaction can only be calculated using the average concentration change.
The presence of a catalyst decreases the rate of reaction without changing the reaction's course.
Correct Answer
Detailed Explanation
The rate of reaction is defined as the change in concentration of reactants or products with respect to time, and is expressed as a positive quantity. Option B is incorrect because the rate law cannot be predicted merely from stoichiometric coefficients. Option C is misleading as instantaneous rates can also be calculated. Option D misrepresents the role of a catalyst, which increases the reaction rate.
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