Chemical Reaction Quiz

In 1888, who suggested that particles must possess a certain minimum amount of kinetic energy in order to react?

• Amadeo Avogadro

• Antoine Lavoisier

• John Dalton

• Svante Arrhenius

Which of the following states that atoms or molecules must collide with enough energy in order for chemical reaction to occur?

• Activated Complex

• Activation Energy

• Collision Theory

• Law of Conservation of Mass

The rate of chemical reaction is affected by several factors. Which of the following would not increase the rate of reaction?

• adding catalyst

• increasing the concentration of reactants

• increasing the volume of the container

• raising the temperature

The reacting molecules should possess the minimum energy called activation energy. How does the activation energy work?

• It breaks the bonds between the reacting molecules.

• It converts the reactants into the activated complex.

• It forms the bonds between the product molecules.

• It makes the reacting particles collide.

How will the crushing of a solid and turning it into a powder increase reaction rate?

• The activation energy barrier will be lowered.

• The orientation of colliding particles will be improved.

• The particles will collide with more energy.

• The powdered form has more surface area.

Treating clothes stains with higher amounts of calamansi extract or laundry bleach removes the stains faster. What factor influences this situation?

• concentration of the reactants

• size of the reactants

• presence of catalyst

• temperature

Which of the following statements about rates of reactions is false?

• Adding a catalyst speeds up chemical reaction.

• Bigger size particles of the reactants lead to faster reaction rates.

• Higher temperature reactions result to faster reaction rates.

• Increasing the concentration of a reactant may increase the rate of reaction.

To address the need for the availability of fruits at all times, Filipino farmers use various ripening agents by applying using kalburo, or placing leaves of kakawate or acacia together with the fruits. Which of the following factors explain why this is possible?

• Catalyst

• concentration of reactants

• particle size

• temperature

Collisions may occur between any two molecules at any given time. Which of the following is not a key concept of the collision theory?

• Particles must collide in order to react.

• Particles must collide with the proper orientation.

• Particles must collide with sufficient energy to reach the activated complex in order.

• Particles must move slowly when they collide, otherwise they simply “bounce off” one another.

What is the suggestion of Svante Arrhenius in 1888 about chemical reaction?

• Activated complex is located at the peak of the energy diagram for a reaction.

• Catalyst may be recovered unchanged at the end of the process.

• Particles must possess a certain minimum amount of kinetic energy in order to react.

• Smaller pieces have a greater surface area, thus, providing much greater contact among the reactants and effecting more collisions.