Chemistry - Chemical Kinetics Question with Solution | TestHub

For a zero order reaction, the rate law is given by:

$\text{Rate}=k[A{]}^0=k$

This shows that the rate of the reaction is equal to the rate constant and is completely independent of the concentration of the reactant.

The half-life of a zero order reaction is given by:

$t_{1/2}=\frac{[A{]}_0}{2k}$

This indicates that the half-life is directly proportional to the initial concentration of the reactant, so it does depend on it.

The unit of the rate constant $k$ for a zero order reaction is ${\text{mol L}}^{-1}{\text{time}}^{-1}$. The unit ${\text{time}}^{-1}$ corresponds to a first order reaction.

Therefore, the correct statement is that the rate of reaction is independent of the concentration of the reactant.

Answer: Rate of reaction is independent of concentration of reactant.