If the reactant particles collide with less than the activation energy, the particles will be rebound, and no reaction will occur.

• True
• False

Tags

NGSS.HS-PS1-5

With the increase in temperature, the average kinetic energy of the molecules increases, leading to a decrease in number of collisions per unit time.

• True
• False

Tags

NGSS.HS-PS1-5

NGSS.HS-PS3-2

In a chemical reaction, collisions between the molecules provide the potential energy needed to break the bond.

• True
• False

Tags

NGSS.HS-PS1-4

The collision theory qualitatively explains how chemical reactions occur and why reaction rates differ for different reactions

• True
• False

Tags

NGSS.HS-PS1-5

The collisions which bring about a chemical reaction are called: 

• Consistent collisions
•  Normal collisions 
• Effective collisions 
• None of the above

More collisions correspond to a: 

• Faster reaction rate  
• Slower reaction rate
• Constant reaction rate 
• None of the above

Tags

NGSS.HS-PS1-5

Which of the following is/are the fundamental idea(s) of collision theory?

• Molecules react by colliding together
• The effective collisions must occur with certain minimum amounts of energy 
• In a large sample, the greater the number of effective collisions, and the faster the rate of reaction
• All of the above

What two factors govern whether a collision between reacting particles will be effective?

• orientation and potential energy 
• kinetic energy and temperature 
• kinetic energy and orientation 
• potential energy and kinetic energy 

Collisions may take place between: 

• Atoms
• Ions
• Molecules
• All of the above

Tags

NGSS.HS-PS2-3

NGSS.HS-PS2-4

Under the collision theory, the particles must collide ____ and ____ for a reaction to occur.

• sufficient rate and sufficient energy
• sufficient surface area and correct orientation
• sufficient catalyst and sufficient energy
• sufficent energy and correct orientation