Question

Which of the following is an incorrect statement?

• A. For a zero order reaction the rate of the reaction is independent of reactant concentration.
• B. In a first order reaction the half-life period does not depend on the initial reactant concentration.
• C. For a chemical reaction the rate constant increases with increase in temperature.
• D. In a zero order reaction plot of reactant concentration against time is a straight line with negative slope.
• E. In a first order reaction, the time required for 75% completion of the reaction is thrice the half-life period.

Hint:

In first order reactions: 50% → 1 half-life, 75% → 2 half-lives, 87.5% → 3 half-lives.

Answer 1

Answer: (E)