NEET Chemistry Rate of Reaction MCQ Question
Which of the following statements about the rate of reaction for first-order reactions is correct?
The half-life of a first-order reaction is independent of its initial concentration.
The rate of a first-order reaction increases as the concentration of the reactant decreases.
For a first-order reaction, the time required to complete 99.9% of the reaction is less than the half-life.
The rate constant for a first-order reaction is always greater than 1.
Correct Answer
Detailed Explanation
For first-order reactions, the half-life is constant and independent of the initial concentration, as mentioned in the NCERT context. This is a key characteristic that distinguishes first-order reactions from others.
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