Question 1

What chemical releases energy as blue-green light when oxidized by a reaction with hydrogen peroxide?

Accepted Answer

A) Laminal 
B) Luminescence 
C) Laminescence 
D) Luminol

Question 2

When 250 mg of a pain reliever is taken, and approximately 60 mg is left in the body after 8 hours, what is the half-life of the medication?

Accepted Answer

The answer of When 250 mg of a pain reliever...

Question 3

If 2.5 grams of a radioactive isotope exist after 30 days in a storage vial, how much was present when it was sealed if the t½ = 6 days?

Accepted Answer

A) 80 grams 
B) 60 grams 
C) 40 grams 
D) 20 grams

Question 4

What is a steady-state concentration in medical dosages?

Accepted Answer

A) One in which the dosage interval equals the drug's half-life 
B) One in which the dosage interval exceeds the drug's half-life 
C) One in which the dosage interval is less than the drug's half-life 
D) One in which the dosage interval equals the initial drug concentration

Question 5

What is an enzyme?

Accepted Answer

A) A large molecule that acts as a catalyst within a living system 
B) A large molecule that acts as a filter within a living system 
C) A molecule that acts as a catalyst within any system 
D) A molecule that acts heterogeneously within a living system

Question 6

What can prevent a reaction from occurring, on the molecular level, even if both particles have sufficient kinetic energy to react?

Accepted Answer

A) The size of each particle 
B) The solvent in which the particles exist 
C) The orientation of each particle 
D) Nothing; they will react.

Question 7

If a person takes a pain reliever with a 2.5 hour half-life at 1:00 P.M., at what time will three half-lives have expired?

Accepted Answer

A) 3:30 P.M. 
B) 6:00 P.M. 
C) 8:30 P.M. 
D) None of the above.

Question 8

What does collision theory predict will occur when reactant concentration is increased?

Accepted Answer

A) It will increase. 
B) It will stay the same. 
C) It will decrease. 
D) It makes no prediction about this.

Question 9

The decrease in the concentration of products is a routine way to measure the rate of a chemical reaction.

Accepted Answer

A) True 
 B)False

Question 10

What do all homogeneous catalysts have in common?

Accepted Answer

A) A metal center 
B) Aqueous solubility 
C) Solubility in organic solvents 
D) They are in the same phase as the reactants.

Question 11

What is the half-life of a medicine for which 25% remains in the body after 12 hours?

Accepted Answer

The answer of What is the half-life of a medicine...

Question 12

How many enzymes does the Codexis synthesis of atorvastatin use?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) None; the enzyme synthesis always had problems based on the enzyme's reactivity.

Question 13

Why doesn't a product form when particles collide, according to collision theory?

Accepted Answer

A) The particles may have too high an energy. 
B) The particles may not be of high enough energy. 
C) The particles may not be the right size. 
D) The particles may not collide.

Question 14

What is the purpose of the drug atorvastatin?

Accepted Answer

A) It lowers blood pressure. 
B) It corrects erectile dysfunction. 
C) It lowers drug serum cholesterol. 
D) It is a by-product of Lipitor production.

Question 15

What type of molecular-level collisions result in products?

Accepted Answer

A) Low-energy, directed collisions 
B) High-energy collisions 
C) High-energy, high-temperature collisions 
D) None of the above

Question 16

Collision theory is a model of how chemical reactions occur on a cellular level.

Accepted Answer

A) True 
 B)False

Question 17

How much faster is the reaction rate in the second step of the Codexis synthesis of atorvastatin, when enzymes are used?

Accepted Answer

A) 10 times faster 
B) 100 times faster 
C) 4,000 times faster 
D) It is no faster, but the use of the enzyme in this step means significant amounts of pollutants are not generated.

Question 18

In the reaction N2 + 3 H2 → 2 NH3, the addition of nitrogen to the reaction does not speed up the reaction rate. What type of reaction can this be considered with respect to nitrogen?

Accepted Answer

A) An acid-base reaction 
B) A zero-order reaction 
C) A second-order reaction 
D) A biphasic reaction

Question 19

When nitrogen gas is combined with oxygen gas to form nitrogen monoxide, according to the reaction N2 + O2 → 2NO, what can be used to measure the rate of the reaction?

Accepted Answer

A) NO formation 
B) N2 consumption 
C) O2 production 
D) Both a and b

Question 20

In a certain reaction, the concentration of a single reactant is doubled and the rate goes up by a factor of 4. What is the order of the reaction with respect to that reactant?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) None of the above.

Exam 11: Applications of Chemical Kinetics