Question 1

Match the rate of each reaction with the overall order .
-Rate = k[A][B]

Accepted Answer

A) 3 
B) 1 
C) 0 
D) 2 
E) 4 
A) 3 
B) 1 
C) 0 
D) 2 
E) 4

Question 2

Doubling the concentration of A leads to doubling the rate, while doubling the concentration of B quadruples the rate. The rate equation is, therefore, ________. A + B → C

Accepted Answer

A)  Rate = k[A][B]2 
B)  Rate = k[A] 
C)  Rate = k[A]2 
D)  Rate = k[A]2[B] 
A)  Rate = k[A][B]2 
B)  Rate = k[A] 
C)  Rate = k[A]2 
D)  Rate = k[A]2[B]

Question 3

Which of the following is true about enzymes?

Accepted Answer

A)  They speed up reactions in a selective fashion. 
B)  They are very large proteins. 
C)  They contain specifically shaped pockets that fit only specific reactant molecules. 
D)  All of the above are true. 
A)  They speed up reactions in a selective fashion. 
B)  They are very large proteins. 
C)  They contain specifically shaped pockets that fit only specific reactant molecules. 
D)  All of the above are true.

Question 4

The rate constant is dependant on the activation energy and reactant orientation during a collision.

Accepted Answer

A) True 
 B)False

Question 5

When the products are higher in energy than the reactants, the reaction is endothermic.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following is endothermic?

Accepted Answer

A)  melting ice 
B)  freezing water 
C)  dry ice formed from carbon dioxide 
D)  condensing water vapor 
A)  melting ice 
B)  freezing water 
C)  dry ice formed from carbon dioxide 
D)  condensing water vapor

Question 7

Which of the following can be done to increase the likelihood that a chemical reaction will take place?

Accepted Answer

A)  decrease the average speed of the reacting molecules 
B)  induce more collisions between reacting molecules 
C)  remove all the water from the reaction mixture 
D)  break the reaction up into a series of steps 
A)  decrease the average speed of the reacting molecules 
B)  induce more collisions between reacting molecules 
C)  remove all the water from the reaction mixture 
D)  break the reaction up into a series of steps

Question 8

Which of the following does not affect the rate of a reaction?

Accepted Answer

A)  the concentration of the reactants 
B)  the energy of activation 
C)  the temperature 
D)  the external pressure 
A)  the concentration of the reactants 
B)  the energy of activation 
C)  the temperature 
D)  the external pressure

Question 9

If the concentration of B is doubled while the concentration of A is unchanged, the rate will ________. A (g) + 3B (g) → C (g) + 2D (g)
Rate = k[A][B]3

Accepted Answer

A)  stay the same 
B)  be increased by a factor of 6 
C)  double 
D)  be increased by a factor of 8 
A)  stay the same 
B)  be increased by a factor of 6 
C)  double 
D)  be increased by a factor of 8

Question 10

Industrial chemists often have their choice of catalysts to use when designing, for example, a factory that produces ammonia. Explain why biochemists studying life processes (such as protein metabolism) do not have the same variety of choices for which enzyme they would use.

Accepted Answer

Enzymes are specifically designed, and s

Question 11

The rate is second order with respect to the reactant and sixth order overall.
Rate = k[A]2[B]3

Accepted Answer

A) True 
 B)False

Question 12

The reaction energy profile can tell if a reaction is exothermic or endothermic.

Accepted Answer

A) True 
 B)False

Question 13

A catalyst lowers the activation energy for a chemical reaction.

Accepted Answer

A) True 
 B)False

Question 14

Adding a catalyst increases the rate of reaction by providing the additional energy needed to overcome a large energy of activation.

Accepted Answer

A) True 
 B)False

Question 15

Generally in a biochemical reaction the first step involves ________.

Accepted Answer

A)  the reaction of the enzyme with the active site of the substrate 
B)  the reaction of the substrate with the active site of the enzyme 
C)  the reaction of the substrate with the enzyme-substrate complex 
D)  the reaction of the enzyme with the enzyme-substrate complex 
A)  the reaction of the enzyme with the active site of the substrate 
B)  the reaction of the substrate with the active site of the enzyme 
C)  the reaction of the substrate with the enzyme-substrate complex 
D)  the reaction of the enzyme with the enzyme-substrate complex

Question 16

Enzymes serve as catalysts in biochemical reaction systems.

Accepted Answer

A) True 
 B)False

Question 17

This factor depends on concentration and can be manipulated.

Accepted Answer

A)  the total number of collisions that occur per unit time 
B)  the fraction of collisions with energy larger than the energy of activation 
C)  the fraction of collisions with the proper orientation 
D)  All of the above are correct. 
A)  the total number of collisions that occur per unit time 
B)  the fraction of collisions with energy larger than the energy of activation 
C)  the fraction of collisions with the proper orientation 
D)  All of the above are correct.

Question 18

An endothermic reaction usually leads to cooling.

Accepted Answer

A) True 
 B)False

Question 19

In an endothermic reaction, the top of the energy barrier to the products is a higher value than the top of the energy barrier to the reactants.

Accepted Answer

A) True 
 B)False

Question 20

A catalyst need not be present in large quantities.

Accepted Answer

A) True 
 B)False

Match the rate of each reaction with the overall order . -Rate = k[A][B]

Doubling the concentration of A leads to doubling the rate, while doubling the concentration of B quadruples the rate. The rate equation is, therefore, ________. A + B → C

Which of the following is true about enzymes?

The rate constant is dependant on the activation energy and reactant orientation during a collision.

When the products are higher in energy than the reactants, the reaction is endothermic.

Which of the following is endothermic?

Which of the following can be done to increase the likelihood that a chemical reaction will take place?

Which of the following does not affect the rate of a reaction?

If the concentration of B is doubled while the concentration of A is unchanged, the rate will ________. A (g) + 3B (g) → C (g) + 2D (g) Rate = k[A][B]3

Industrial chemists often have their choice of catalysts to use when designing, for example, a factory that produces ammonia. Explain why biochemists studying life processes (such as protein metabolism) do not have the same variety of choices for which enzyme they would use.

The rate is second order with respect to the reactant and sixth order overall. Rate = k[A]2[B]3

The reaction energy profile can tell if a reaction is exothermic or endothermic.

A catalyst lowers the activation energy for a chemical reaction.

Adding a catalyst increases the rate of reaction by providing the additional energy needed to overcome a large energy of activation.

Generally in a biochemical reaction the first step involves ________.

Enzymes serve as catalysts in biochemical reaction systems.

This factor depends on concentration and can be manipulated.

An endothermic reaction usually leads to cooling.

In an endothermic reaction, the top of the energy barrier to the products is a higher value than the top of the energy barrier to the reactants.

A catalyst need not be present in large quantities.

What Is Chemistry

The Numerical Side of Chemistry

The Evolution of Atomic Theory

The Modern Model of the Atom

Chemical Bonding and Nomenclature

The Shape of Molecules

Intermolecular Forces and the Phases of Matter

Chemical Reactions

Stoichiometry and the Mole

Electron Transfer in Chemical Reactions

What If There Were No Intermolecular Forces - the Ideal Gas

Solutions

Chemical Equilibrium

Electrolytes, Acids, and Bases

Nuclear Chemistry

The Chemistry of Carbon

Synthetic and Biological Polymers

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Exam 13: When Reactants Turn Into Products

Match the rate of each reaction with the overall order . -Rate = k[A][B]

Doubling the concentration of A leads to doubling the rate, while doubling the concentration of B quadruples the rate. The rate equation is, therefore, ________. A + B → C

Which of the following is true about enzymes?

The rate constant is dependant on the activation energy and reactant orientation during a collision.

When the products are higher in energy than the reactants, the reaction is endothermic.

Which of the following is endothermic?

Which of the following can be done to increase the likelihood that a chemical reaction will take place?

Which of the following does not affect the rate of a reaction?

If the concentration of B is doubled while the concentration of A is unchanged, the rate will ________. A (g) + 3B (g) → C (g) + 2D (g) Rate = k[A][B]3

Industrial chemists often have their choice of catalysts to use when designing, for example, a factory that produces ammonia. Explain why biochemists studying life processes (such as protein metabolism) do not have the same variety of choices for which enzyme they would use.

The rate is second order with respect to the reactant and sixth order overall. Rate = k[A]2[B]3

The reaction energy profile can tell if a reaction is exothermic or endothermic.

A catalyst lowers the activation energy for a chemical reaction.

Adding a catalyst increases the rate of reaction by providing the additional energy needed to overcome a large energy of activation.

Generally in a biochemical reaction the first step involves ________.

Enzymes serve as catalysts in biochemical reaction systems.

This factor depends on concentration and can be manipulated.

An endothermic reaction usually leads to cooling.

In an endothermic reaction, the top of the energy barrier to the products is a higher value than the top of the energy barrier to the reactants.

A catalyst need not be present in large quantities.

What Is Chemistry

The Numerical Side of Chemistry

The Evolution of Atomic Theory

The Modern Model of the Atom

Chemical Bonding and Nomenclature

The Shape of Molecules

Intermolecular Forces and the Phases of Matter

Chemical Reactions

Stoichiometry and the Mole

Electron Transfer in Chemical Reactions

What If There Were No Intermolecular Forces - the Ideal Gas

Solutions

Chemical Equilibrium

Electrolytes, Acids, and Bases

Nuclear Chemistry

The Chemistry of Carbon

Synthetic and Biological Polymers

Filters