Unit 11 Review

What is the minimum energy required for a chemical reaction to proceed called?

• Reaction energy

• Activation energy

• Kinetic energy

• Potential energy

What is the term for the point in a chemical reaction where old bonds begin breaking and new bonds start forming?

• Reaction intermediate

• Transition state

• Activated complex

• Catalyst point

What is the role of a catalyst in a chemical reaction?

• To consume the reactants

• To produce the products

• To increase the reaction temperature

• To lower the activation energy

What is the term used to describe the speed of a chemical reaction?

• Reaction time

• Reaction rate

• Reaction speed

• Reaction interval

Tags

NGSS.HS-PS1-5

Which of the following reactions would typically occur at the fastest rate?

• Digesting food

• Combusting gasoline

• Converting graphite to diamond

• Lighting a match

Tags

NGSS.HS-PS1-5

On a scale from 1 to 3, where 1 is the slowest, how would you rate the reaction rate of converting graphite to diamond?

• 1

• 2

• 3

• Not applicable

Tags

NGSS.HS-PS1-5

What is the rate of a chemical reaction expressed as?

• The amount of product formed per unit time

• The amount of reactant changing per unit time

• The speed of product decomposition

• The time it takes for a reaction to complete

Tags

NGSS.HS-PS1-5

Which of the following is an example of a very fast reaction?

• Rusting of iron

• Baking a cake

• Combustion of fuel

• Weathering of rocks

Tags

NGSS.HS-PS1-5

What type of reaction speed is associated with the setting of concrete?

• Very fast

• Moderate

• Very slow

• Instantaneous

Tags

NGSS.HS-PS1-5

Which factor increases the rate of a chemical reaction by providing an alternative pathway with a lower activation energy?

• Temperature

• Concentration

• Pressure

• Catalysts