Factor affecting reaction rate Quiz

What is the effect of increasing the concentration of reactants on the reaction rate?

• Decrease in reaction rate

• No effect on reaction rate

• Causes the reaction to stop

• Increase in reaction rate

Explain how the concentration of reactants affects the rate of a chemical reaction.

• Lower concentration of reactants leads to a faster reaction rate.

• The reaction rate is faster when the concentration of reactants is constant.

• Higher concentration of reactants leads to a faster reaction rate.

• Concentration of reactants has no effect on the reaction rate.

How does an increase in temperature affect the rate of a chemical reaction?

• Increases

• Causes explosion

• Has no effect

• Decreases

Discuss the relationship between temperature and reaction rate.

• Temperature and reaction rate are directly proportional.

• Temperature has no effect on reaction rate.

• Reaction rate increases with decreasing temperature.

• Temperature and reaction rate are inversely proportional.

What role do catalysts play in altering the rate of a chemical reaction?

• Catalysts only work in slowing down the rate of a chemical reaction.

• Catalysts lower the activation energy of a reaction.

• Catalysts have no effect on the rate of a chemical reaction.

• Catalysts increase the activation energy of a reaction.

Explain how catalysts affect the rate of a chemical reaction.

• Catalysts change the stoichiometry of the reaction, leading to different products

• Catalysts have no effect on the rate of a chemical reaction

• Catalysts lower the activation energy barrier for the reaction, allowing it to proceed at a faster rate.

• Catalysts increase the activation energy barrier for the reaction, slowing it down

How does pressure affect the rate of a chemical reaction for gaseous reactants?

• Pressure has no effect on the rate of the reaction.

• Increasing pressure decreases the rate of the reaction.

• Decreasing pressure increases the rate of the reaction.

• Increasing pressure increases the rate of the reaction.

Discuss the impact of pressure on the rate of a chemical reaction involving gaseous reactants.

• Pressure has no impact on the rate of the chemical reaction.

• Increasing pressure increases the rate of the chemical reaction.

• Increasing pressure decreases the rate of the chemical reaction.

• Decreasing pressure increases the rate of the chemical reaction.

What is the effect of the size of particles on the rate of a chemical reaction?

• Smaller particles increase the rate of the chemical reaction.

• Larger particles increase the rate of the chemical reaction.

• The size of particles has no effect on the rate of the chemical reaction.

• Smaller particles decrease the rate of the chemical reaction.

Explain how the size of particles influences the rate of a chemical reaction.

• Increasing the surface area available for the reaction to occur

• Decreasing the temperature of the particles

• Increasing the distance between particles

• Decreasing the surface area available for the reaction to occur