Science Made Simple: Rate of Reaction Quiz

What is the balanced chemical equation for the decomposition of hydrogen peroxide catalyzed by manganese(IV) oxide?

• H2O2(aq) → 2 H2O(l) + O2(g)

• 2 H2O2(aq) → 2 H2O(l) + O2(g)

• 2 H2O2(aq) → H2O(l) + 2 O2(g)

• H2O2(aq) → H2O(l) + O2(g)

In the decomposition of hydrogen peroxide, what is the oxidation state of oxygen in H2O2?

• -2

• -1

• 0

• +1

What type of reaction involves both reduction and oxidation occurring simultaneously?

• Synthesis reaction

• Decomposition reaction

• Redox reaction

• Neutralization reaction

What are the control variables in the experimental setups Y and Z?

• Volume of hydrogen peroxide

• Mass of catalyst and temperature

• Concentration of hydrogen peroxide

• Time of reaction

How is the number of moles of hydrogen peroxide calculated in the experiments?

• By dividing concentration by volume

• By multiplying concentration by volume

• By adding concentration and volume

• By subtracting volume from concentration

Which graph represents a higher rate of reaction based on the gradient?

• Graph Y

• Graph Z

• Neither graph shows a rate

• Both graphs have the same rate

Does the volume of hydrogen peroxide affect the rate of reaction?

• It depends on the catalyst used

• Yes, it decreases the rate

• No, it does not affect the rate

• Yes, it increases the rate

How does an increase in concentration affect the rate of reaction?

• It decreases the rate

• It stops the reaction

• It has no effect on the rate

• It increases the rate

What is the relationship between the gradient of a graph and the rate of reaction?

• A steeper gradient indicates a higher rate

• A gentler gradient indicates a higher rate

• The gradient does not relate to the rate

• A steeper gradient indicates a lower rate

Which option has a higher concentration of hydrogen peroxide than graph Y?

• Option 3

• Option 4

• Option 2

• Option 1