1.According to Collision Theory, which of the following is NOT necessary for a reaction to occur? *

A. collide

B. must collide in proper orientation

C. must collide with enough energy

D. none of the above

2.What is the rate of reaction? *

A. How much energy is needed for a reaction to occur

B. The energy required to break a bond

C. The time it takes for a reaction to occur

D. The factor that affect the chemical reaction

3.Which is NOT a factor that affect the rate of reaction? *

A. Temperature

B. Concentration

C. Solubility

D. Particle Size

4.Which of the following will NOT happen when there is an increase in concentration? *

A. The number of particles will increase. B. The rate of reaction will also increase.

C. There is an increase in collision frequency.

D .The kinetic energy of particles will increase.

5.What would the increase of temperature can do to the rate of chemical reaction? *

A. Slow collision frequency

B. Not affect the rate of reaction

C. Allow less effective collision particles

D. Makes particles collide more, thus increases the rate of reaction

6. The __________ the surface area, the more sites of collision there will be. *

A. fewer

B. greater

C. smaller

D. more mobile

7. Which of the following is most likely to happen if you lower the pressure in a reacting gas chamber?

A. the reaction will slow down due to fewer collisions.

B. the reaction will be faster due to increase in collisions.

C. the reaction will slow down due to increase in collisions.

D. the reaction will be faster due to fewer collisions.

8. Which of the following is another term for activation energy? *

A. energy barrier

B. internal energy

C. free energy

D. reaction enthalpy

9. Which of the following is TRUE about catalysts? *

A. They lower the activation energy of the reaction. B. They increase the free energy of the reaction. C. They are the reacting molecules that become products.

D. They are the products formed after a reaction.