Chemical Kinetics Practice

8 problems · instant feedback · full explanations

Kinetics is about how fast reactions go. These eight problems cover reaction order, half-life calculations, catalysts, and temperature effects on rate.

Q1.
For the rate law rate = k[A]^2[B], the overall order of the reaction is:

Multiple choice · Easy

Q2.
A first-order reaction has k = 0.050 s^-1. What is its half-life? Use t1/2 = 0.693/k.

Numerical answer (s) · Medium

Q3.
A catalyst speeds up a reaction by lowering its activation energy.

True / False · Easy

Q4.
For a first-order reaction, doubling the reactant concentration:

Multiple choice · Easy

Q5.
According to the Arrhenius equation, raising the temperature generally:

Multiple choice · Beginner

Q6.
What fraction of a sample remains after 3 half-lives?

Numerical answer · Medium

Q7.
The rate constant k changes when the reactant concentration changes.

True / False · Medium

Q8.
The units of the rate constant k for a second-order reaction are:

Multiple choice · Hard

Chemical Kinetics Practice

Q1. For the rate law rate = k[A]^2[B], the overall order of the reaction is:

Q2. A first-order reaction has k = 0.050 s^-1. What is its half-life? Use t1/2 = 0.693/k.

Q3. A catalyst speeds up a reaction by lowering its activation energy.

Q4. For a first-order reaction, doubling the reactant concentration:

Q5. According to the Arrhenius equation, raising the temperature generally:

Q6. What fraction of a sample remains after 3 half-lives?

Q7. The rate constant k changes when the reactant concentration changes.

Q8. The units of the rate constant k for a second-order reaction are: