Rate of Chemical Reactions Quiz

The rate of a chemical reaction is defined as:

• The total amount of reactants used

• The speed at which reactants are converted into products

• The amount of product at equilibrium

• The ratio of reactants to products

Which of the following factors does NOT affect the rate of a reaction?

• Temperature

• Pressure

• Catalyst

• Volume of the container

Increasing the temperature of a reaction generally:

• Increases the activation energy

• Decreases the number of effective collisions

• Increases the reaction rate

• Stops the reaction

A catalyst works by:

• Increasing the energy of reactant molecules

• Decreasing the activation energy

• Increasing the reaction time

• Changing the products of the reaction

Which of the following would NOT increase the rate of a chemical reaction?

• Adding a catalyst

• Increasing the concentration of reactants

• Increasing the activation energy

• Increasing the temperature

The minimum energy required for a reaction to occur is called:

• Reaction rate

• Activation energy

• Enthalpy change

• Equilibrium energy

The unit of reaction rate is typically expressed as:

• mol/L

• L/mol

• mol/L·s

• g/L

How does increasing the concentration of reactants affect the rate of reaction?

• It decreases the rate

• It has no effect

• It increases the rate

• It changes the equilibrium constant

A catalyst is not consumed in a reaction because:

• It only changes the reactants

• It does not take part in the reaction

• It speeds up the reaction without undergoing permanent change

• It decreases the temperature of the reaction

If the surface area of a solid reactant is increased, the rate of reaction will:

• Decrease

• Increase

• Remain the same

• Stop completely