Which of the following statements about a catalyst is true?
Question 14 options:

A catalyst can be changed chemically during a reaction.

A catalyst can accelerate the rate of a reaction.

A catalyst can initiate a reaction.

A catalyst can be consumed during a reaction.
Question 15 (4 points)
Which of the following statements about a catalyst is true?
Question 15 options:

A catalyst can initiate a reaction.

A catalyst can accelerate a reaction.

A catalyst can be consumed during a reaction.

A catalyst can be changed during a reaction.
Question 16 (4 points)
According to the rate law, the reaction rate is directly proportional to the molar concentration of the reactant.
Question 16 options:
True
False
Question 17 (4 points)
A(n) _____ exists in the same physical state as that of the reaction it catalyzes.
Question 17 options:

heterogeneous catalyst

homogeneous catalyst

inhibitor

product
Question 18 (4 points)
Most chemical reactions consist of sequences of two or more simpler reactions.
Question 18 options:
True
False
Question 19 (4 points)
The potential energy of an activated complex is at a maximum.
Question 19 options:
True
False
Question 20 (4 points)
If a collision between molecules is very gentle, the molecules are
Question 20 options:

more likely to be oriented favorably.

less likely to be oriented favorably.

likely to react.

likely to rebound without reacting.
Question 21 (4 points)
Chemists can change the rate of a reaction by changing the concentrations of the reactants.
Question 21 options:
True
False
Question 22 (4 points)
Which of the following factors does not affect the rate of reaction?
Question 22 options:

The size of the container used.

The temperature at which the reaction is carried out.

The amount of the reactants.

The physical state of the reactants.
Question 23 (4 points)
A/An _____ is a substance that slows down the rate of a reaction.
Question 23 options:

catalyst

inhibitor

reactant

product
Question 24 (4 points)
The upward-sloped straight line of the graph below indicates which type of relationship between the concentration of H2O2 and the initial reaction rate?

Question 24 options:

indirect

direct

absolute

inverse
Question 25 (4 points)
The rate of a chemical reaction is defined as the change in concentration of a reactant or product in a given time interval.
Question 25 options:
True
False

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