NEET Chemistry Order of Reaction MCQ Question
For a first order reaction with a rate constant k, how does the time required for 99.9% completion compare to its half-life, t 1/2?
It is 10 times the half-life.
It is equal to the half-life.
It is 5 times the half-life.
It is 20 times the half-life.
Correct Answer
Detailed Explanation
For a first order reaction, the time required for 99.9% completion is 10 times its half-life, as shown by the formula t = 6.909/k and t 1/2 = 0.693/k.
Found an issue with this question?
Related Questions
More from
Which of the following factors does NOT affect the rate of a chemical reaction?
Assertion (A): The rate constant of a first-order reaction is independent of the initial concentration of the reactants. | Reason (R): The half-life o...
Consider a potential energy diagram where the y-axis represents potential energy and the x-axis represents the reaction coordinate. Which point on the...