1. Physical Chemistry

Chemical Kinetics — Quiz

Test your understanding of chemical kinetics with 5 practice questions.

Practice Questions

Question 1

Which of the following best describes the relationship between the half-life of a first-order reaction and the rate constant $k$?

Question 2

For a reaction with the following rate law: $\text{Rate} = k[\text{A}]^1[\text{B}]^2$, what are the units of the rate constant $k$ if the rate is measured in $\text{mol dm}^{-3}\text{ s}^{-1}$?

Question 3

A reaction mechanism is proposed with the following steps: \ Step 1: $\text{X} + \text{Y} \xrightarrow{\text{slow}} \text{Z}$ \ Step 2: $\text{Z} + \text{W} \xrightarrow{\text{fast}} \text{P}$. \ What is the rate law for the overall reaction based on this mechanism?

Question 4

Consider the following reaction: $2\text{A} + \text{B} \rightarrow \text{C}$. The experimentally determined rate law is $\text{Rate} = k[\text{A}]^2$. What is the order of the reaction with respect to reactant B?

Question 5

The Arrhenius equation is given by $k = A e^{-\frac{E_a}{RT}}$. If the activation energy $E_a$ is increased while all other factors remain constant, what will happen to the rate constant $k$?