Question

For the reaction, $A\to B$, the rate law is, rate $=k\left[A\right]$. Which of the following statements is incorrect?

• A. The reaction follows first order kinetics.
• B. The $t_{1/2}$ of the reaction depends on initial concentration.
• C. $k$ is constant for the reaction at a constant temperature.
• D. The rate law provides a simple way of predicting the concentration of reactants at any time after the start of the reaction.

Answer 1

The correct option is B The $t_{1/2}$ of the reaction depends on initial concentration.

For first order rate

$v=k\left[A\right]$

$t_{1/2}=\frac{0.693}{k}⟶$ no dependence on $\left[A_0\right].$