Rate of Reaction Quiz

What happens to the rate of reaction when the temperature is increased in a chemical reaction?

• The rate of reaction remains constant

• No effect on the rate of reaction

• The rate of reaction increases

• The rate of reaction decreases

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

• The rate of reaction is only affected by the temperature, not the concentration of reactants.

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

• Lower concentration leads to a faster reaction rate.

• Higher concentration leads to a faster reaction rate.

Explain the relationship between surface area of reactants and the rate of reaction.

• The surface area of reactants has no impact on the rate of reaction.

• The rate of reaction decreases with an increase in the surface area of reactants.

• The rate of reaction is not affected by the surface area of reactants.

• The rate of reaction increases with an increase in the surface area of reactants.

At a science fair, Arjun and Abigail are conducting an experiment to understand the effect of temperature on the rate of reaction. They observe that at higher temperatures, particles move faster. How does this affect the rate of reaction?

• Stay the same, it has no effect on the rate of reaction

• Slower, it increases the rate of reaction

• Slower, it decreases the rate of reaction

• Faster

What happens to the rate of reaction when the concentration of reactants is increased?

• The rate of reaction becomes unpredictable

• The rate of reaction decreases

• The rate of reaction increases

• The rate of reaction remains the same

How does increasing the surface area of reactants impact the rate of reaction?

• It increases the rate of reaction.

• It only impacts the rate of reaction in certain types of reactions.

• It has no impact on the rate of reaction.

• It decreases the rate of reaction.

Why does an increase in temperature generally lead to a faster rate of reaction?

• More energy is available for the reacting molecules

• The catalyst becomes less effective

• The concentration of the reactants decreases

• The molecules become less reactive

In what way does the concentration of reactants influence the frequency of collisions between particles?

• Increasing the concentration of reactants decreases the frequency of collisions between particles.

• Decreasing the concentration of reactants increases the frequency of collisions between particles.

• The concentration of reactants has no effect on the frequency of collisions between particles.

• Increasing the concentration of reactants increases the frequency of collisions between particles.

What role does the surface area of reactants play in increasing the rate of reaction?

• It increases the rate of reaction by slowing down the movement of particles

• It decreases the rate of reaction by reducing the space for particles to collide

• It provides more area for the particles to collide and react.

• It has no effect on the rate of reaction

Explain the concept of activation energy and its relationship to temperature in the context of rate of reaction.

• When Avery and Anika work on their science project in a cold room, the reactant molecules slow down, decreasing the rate of reaction

• As Isla increases the temperature in her experiment, the kinetic energy of the reactant molecules also increases, leading to more frequent and energetic collisions, which in turn increases the likelihood of successful collisions and therefore the rate of reaction.

• Temperature has no effect on the rate of reaction

• Activation energy decreases as temperature increases, slowing down the rate of reaction