Post-Test-COT2-PhyScie-Collision Theory.....

1.Condition that needs to be met for a chemical reaction to occur.

• a. Substance must be homogeneous.

• b. Temperature should be kept constant.

• c. Particles should maintain a certain distance from each other.

• d. Particles in the substance must collide and have enough energy.

Tags

NGSS.HS-PS1-5

2. The factor that would NOT affect the rate of a chemical reaction.

• a. Concentration

• b. Humidity

• c. Particle Size

• D. Temperature

Tags

NGSS.HS-PS1-5

3. The factor that will slow down the rate of a chemical reaction.

• a. Manual stirring of the substance

• b.Placing substance in a hot water

• c. Placing catalyst in iced water

• d. Placing reactants in an ice bath

Tags

NGSS.HS-PS1-5

4. The substance formed as a result of a chemical reaction.

• a. Product

• b. Reactant

• c. Resistant

• d. Substrate

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

5. A form of matter that has definite composition and distinct characteristics.

• a. Atoms

• b. Compound

• c. Mixture

• d. Substance

6. What condition/s must be met in order for a chemical reaction to occur?

• a. Collision with proper orientation

• b. Sufficient activation energy

• c. Adding more reactant particles

• d. Both collision with proper orientation and sufficient energy

7. Which of the following would NOT increase the rate of reaction?

• a. Increasing the temperature

• b. Adding catalyst

• c. Increasing the volume

• d. Increasing the concentrations

Tags

NGSS.HS-PS1-5

8. Suppose you dissolve Zinc (Zn) in Hydrochloric acid (HCl) and add more acid than usual. Then drop pieces of Zinc. What factor does NOT affect the rate of the reaction?

• a. Surface area of the Zinc

• b. Concentration of the reactant

• c. Temperature of the solution

• d. Amount of Hydrochloric acid

Tags

NGSS.HS-PS1-5

9. Activation energy is the amount of energy required

to ____________.

• a. Break the bonds between the reacting molecules

• b. Make the reacting particles collide

• c. Form the bonds between the product molecules

• d. Convert the reactant to a single product

Tags

NGSS.HS-PS1-4

10. Why does a candle burn more rapidly when placed in an open jar than in air? What accounts for this reaction?

• a. Higher Oxygen concentration

• b. Greater surface area of the jar

• c. Increasing the surrounding temperature

• d. Length of the candle

Tags

NGSS.HS-PS1-5