Designing Chemical Processes and Products that Reduce or
Eliminate Hazardous Substances
Multiple Choice Questions (MCQs) for Liberty University
1. What is the primary goal of green chemistry?
a) Increase profit margins
b) Reduce or eliminate hazardous substances
c) Accelerate chemical reactions
d) Increase product yield
Answer: b
2. Which of the following is NOT one of the 12 Principles of Green Chemistry?
a) Atom economy
b) Design for energy efficiency
c) Maximize resource extraction
d) Use of renewable feedstocks
Answer: c
3. What does the term "benign by design" mean in green chemistry?
a) Designing processes that are inherently safe and environmentally friendly
b) Using only natural products
c) Avoiding all synthetic chemicals
d) Focusing solely on biodegradable materials
Answer: a
4. Which metric is used to measure the efficiency of a chemical reaction in terms of
incorporating atoms from reactants into the final product?
a) Percent yield
b) Atom economy
c) E-factor
d) Carbon efficiency
Answer: b
5. What is the E-factor in green chemistry?
a) The ratio of product mass to reactant mass
b) The ratio of waste mass to product mass
c) The ratio of solvent mass to product mass
d) The ratio of catalyst mass to product mass
Answer: b
6. Which of the following is an example of a renewable feedstock?
a) Petroleum
b) Natural gas
c) Biomass
d) Coal
Answer: c
7. What is the primary advantage of using supercritical CO2 as a solvent?
a) It's highly toxic
b) It's non-flammable and easily removed
c) It's very expensive
d) It's highly reactive
Answer: b
8. Which of the following is NOT a typical characteristic of a green solvent?
a) Low toxicity
b) High volatility
c) Biodegradability
d) Recyclability
Answer: b
9. What is the purpose of a life cycle assessment (LCA) in green chemistry?
a) To determine product shelf life
b) To evaluate environmental impacts from cradle to grave
c) To maximize profits
d) To increase reaction rates
Answer: b
10. Which of the following is an example of a bio-based solvent?
a) Hexane
b) Ethyl lactate
c) Dichloromethane
d) Diethyl ether
Answer: b
11. What does the term "atom economy" represent?
a) The percentage of atoms from reactants that end up in the desired product
b) The total number of atoms in a molecule
c) The ratio of protons to neutrons in an atom
d) The number of valence electrons in an atom
Answer: a
12. Which of the following is a key principle in designing safer chemicals?
a) Maximizing toxicity
b) Minimizing bioaccumulation
c) Increasing persistence in the environment
d) Enhancing reactivity with water
Answer: b
13. What is the primary goal of using catalysts in green chemistry?
a) To increase waste production
b) To decrease reaction selectivity
c) To increase energy consumption
d) To reduce activation energy and increase selectivity
Answer: d
14. Which of the following is an example of a green metric?
a) Reaction time
b) Product color
c) Process mass intensity (PMI)
d) Reagent cost
Answer: c
15. What is the main advantage of using ionic liquids as solvents in green chemistry?
a) They have high vapor pressure
b) They are highly flammable
c) They have negligible vapor pressure and can be recycled
d) They are derived from petroleum
Answer: c
16. Which of the following is NOT a typical characteristic of a green chemical process?
a) High energy efficiency
b) Use of stoichiometric reagents
c) Minimization of waste
d) Use of catalysts
Answer: b
17. What is the primary goal of green engineering?
a) To maximize profit margins
b) To design processes and products that minimize environmental impact
c) To increase the use of non-renewable resources
d) To accelerate the depletion of natural resources
Answer: b
18. Which of the following is an example of a bio-based platform chemical?
a) Benzene
b) Lactic acid
c) Vinyl chloride
d) Acrylonitrile
Answer: b
19. What is the main advantage of using microwave-assisted organic synthesis in green
chemistry?
a) It always leads to higher yields
b) It can significantly reduce reaction times and energy consumption
c) It eliminates the need for solvents
d) It can only be used for small-scale reactions
Answer: b
20. Which of the following is NOT a common method for reducing solvent use in chemical
processes?
a) Solvent-free reactions
b) Solvent recycling
c) Use of supercritical fluids
d) Increasing reaction temperature
Answer: d
21. What is the primary goal of using renewable feedstocks in chemical processes?
a) To increase the cost of production
b) To reduce dependence on fossil fuels
c) To decrease product quality
d) To increase waste generation
Answer: b
22. Which of the following is an example of a green oxidizing agent?
a) Chromium trioxide
b) Hydrogen peroxide
c) Potassium dichromate
d) Lead tetraacetate
Answer: b
23. What is the main advantage of using enzymes as catalysts in green chemistry?
a) They require high temperatures
b) They are non-selective
c) They operate under mild conditions with high selectivity
d) They are derived from non-renewable resources
Answer: c
24. Which of the following is NOT a typical characteristic of a green chemical product?
a) Biodegradability
b) Low toxicity
c) High persistence in the environment
d) Derived from renewable resources
Answer: c
25. What is the primary goal of using photochemistry in green synthesis?
a) To increase energy consumption
b) To utilize sunlight as a renewable energy source
c) To increase the use of heavy metal catalysts
d) To maximize waste production
Answer: b
26. Which of the following is an example of a green reducing agent?
a) Lithium aluminum hydride
b) Sodium borohydride
c) Ascorbic acid
d) Tin(II) chloride
Answer: c
27. What is the main advantage of using continuous flow chemistry in green synthesis?
a) It always leads to lower yields
b) It allows for better control of reaction parameters and improved safety
c) It increases solvent consumption
d) It can only be used for large-scale reactions
Answer: b
28. Which of the following is NOT a common method for reducing energy consumption in
chemical processes?
a) Use of alternative energy sources
b) Process intensification
c) Increasing reaction temperature
d) Heat integration
Answer: c
29. What is the primary goal of using biocatalysis in green chemistry?
a) To increase the use of organic solvents
b) To utilize enzymes for selective and efficient transformations
c) To maximize waste production
d) To increase energy consumption
Answer: b
30. Which of the following is an example of a green chelating agent?
a) EDTA
b) Citric acid
c) Nitrilotriacetic acid
d) Diethylenetriaminepentaacetic acid
Answer: b
31. What is the E-factor of a process that produces 50 kg of product and generates 150 kg of
waste?
a) 0.33
b) 2
c) 3
d) 4
Answer: c
32. If a reaction has an atom economy of 75%, how many grams of waste will be generated
when producing 100 grams of product?
a) 25 grams
b) 33.33 grams
c) 50 grams
d) 75 grams
Answer: b
33. A process has a mass intensity (MI) of 15. If it produces 10 kg of product, what is the total
mass of materials used?
a) 100 kg
b) 150 kg
c) 200 kg
d) 250 kg
Answer: b
34. If a reaction has a carbon efficiency of 80%, how many carbon atoms in the product are
derived from 100 carbon atoms in the reactants?
a) 60
b) 70
c) 80
d) 90
Answer: c
35. A process uses 5 kg of solvent to produce 1 kg of product. What is the solvent intensity of
this process?
a) 0.2
b) 2
c) 5
d) 10
Answer: c
36. If a reaction has an E-factor of 5 and produces 20 kg of product, how much waste is
generated?
a) 50 kg
b) 75 kg
c) 100 kg
d) 125 kg
Answer: c
37. A process has a reaction mass efficiency (RME) of 60%. If 100 grams of reactants are used,
how many grams of product are formed?
a) 40 grams
b) 50 grams
c) 60 grams
d) 70 grams
Answer: c
38. If a reaction has an atom economy of 90% and a yield of 80%, what is the atom utilization?
a) 62%
b) 72%
c) 82%
d) 92%
Answer: b
39. A process uses 2 kg of catalyst to produce 100 kg of product. What is the catalyst intensity
of this process?
a) 0.02
b) 0.05
c) 0.1
d) 0.2
Answer: a
40. If a reaction has a carbon efficiency of 70% and uses 100 moles of carbon-containing
reactants, how many moles of carbon are incorporated into the product?
a) 50 moles
b) 60 moles
c) 70 moles
d) 80 moles
Answer: c
41. What is the primary goal of green chemistry metrics?
a) To increase profit margins
b) To quantify the environmental impact of chemical processes
c) To maximize waste production
d) To increase energy consumption
Answer: b
42. Which of the following is NOT a common green chemistry metric?
a) E-factor
b) Atom economy
c) Reaction yield
d) Carbon efficiency
Answer: c
43. What does the term "process mass intensity" (PMI) represent?
a) The ratio of total mass used in a process to the mass of product
b) The ratio of product mass to reactant mass
c) The ratio of waste mass to product mass
d) The ratio of solvent mass to product mass
Answer: a
44. Which of the following is an example of a renewable energy source used in green
chemistry?
a) Coal
b) Natural gas
c) Solar energy
d) Nuclear energy
Answer: c
45. What is the main advantage of using water as a solvent in green chemistry?
a) It's highly flammable
b) It's non-toxic and environmentally benign
c) It has a high boiling point
d) It's derived from fossil fuels
Answer: b
46. Which of the following is NOT a typical characteristic of a green catalyst?
a) High selectivity
b) Low toxicity
c) High atom economy
d) Non-recyclability
Answer: d
47. What is the primary goal of using alternative reaction media in green chemistry?
a) To increase solvent waste
b) To reduce or eliminate the use of hazardous solvents
c) To increase reaction times
d) To decrease product yield
Answer: b
48. Which of the following is an example of a bio-based polymer?
a) Polyethylene
b) Polylactic acid (PLA)
c) Polyvinyl chloride (PVC)
d) Polystyrene
Answer: b
49. What is the main advantage of using solid-supported reagents in green chemistry?
a) They increase solvent use
b) They are difficult to separate from products
c) They can be easily recovered and reused
d) They decrease reaction selectivity
Answer: c
50. Which of the following is NOT a common method for reducing waste in chemical processes?
a) In-process recycling
b) Use of stoichiometric reagents
c) Catalytic reactions
d) Solvent-free reactions
Answer: b
51. If a process has an E-factor of 4 and produces 25 kg of product, how much waste is
generated?
a) 75 kg
b) 100 kg
c) 125 kg
d) 150 kg
Answer: b
52. A reaction has an atom economy of 80%. If 100 grams of reactants are used, what is the
maximum possible mass of product?
a) 60 grams
b) 70 grams
c) 80 grams
d) 90 grams
Answer: c
53. If a process has a mass intensity (MI) of 20 and uses 500 kg of materials, how much product
is formed?
a) 15 kg
b) 20 kg
c) 25 kg
d) 30 kg
Answer: c
54. A reaction has a carbon efficiency of 75%. If the product contains 60 carbon atoms, how
many carbon atoms were present in the reactants?
a) 60
b) 70
c) 80
d) 90
Answer: c
55. If a process uses 3 kg of solvent to produce 2 kg of product, what is the solvent intensity?
a) 0.67
b) 1.5
c) 2
d) 3
Answer: b
56. A reaction has an E-factor of 3 and produces 40 kg of waste. How much product is formed?
a) 10 kg
b) 13.33 kg
c) 15 kg
d) 20 kg
Answer: b
57. If a process has a reaction mass efficiency (RME) of 70% and uses 200 grams of reactants,
how many grams of product are formed?
a) 120 grams
b) 130 grams
c) 140 grams
d) 150 grams
Answer: c
58. A reaction has an atom economy of 85% and a yield of 75%. What is the atom utilization?
a) 53.75%
b) 63.75%
c) 73.75%
d) 83.75%
Answer: b
59. If a process uses 0.5 kg of catalyst to produce 50 kg of product, what is the catalyst
intensity?
a) 0.01
b) 0.02
c) 0.05
d) 0.1
Answer: a
60. A reaction has a carbon efficiency of 60%. If the reactants contain 200 moles of carbon, how
many moles of carbon are incorporated into the product?
a) 100 moles
b) 120 moles
c) 140 moles
d) 160 moles
Answer: b
61. What is the primary goal of using renewable feedstocks in green chemistry?
a) To increase production costs
b) To reduce dependence on fossil resources
c) To decrease product quality
d) To increase waste generation
Answer: b
62. Which of the following is NOT a typical characteristic of a green solvent?
a) Low toxicity
b) High volatility
c) Biodegradability
d) Derived from renewable resources
Answer: b
63. What is the main advantage of using microreactors in green chemistry?
a) They increase energy consumption
b) They allow for better heat and mass transfer
c) They maximize solvent use
d) They decrease reaction selectivity
Answer: b
64. Which of the following is an example of a green oxidizing agent?
a) Chromium trioxide
b) Oxygen
c) Potassium permanganate
d) Lead tetraacetate
Answer: b
65. What is the main advantage of using phase transfer catalysis in green chemistry?
a) It increases solvent use
b) It allows reactions between immiscible reactants without organic solvents
c) It decreases reaction rates
d) It increases waste production
Answer: b
66. Which of the following is NOT a common method for improving energy efficiency in chemical
processes?
a) Process intensification
b) Heat integration
c) Use of microwaves
d) Increasing reaction temperature
Answer: d
67. What is the primary goal of using biocatalysts in green chemistry?
a) To increase the use of organic solvents
b) To utilize enzymes for selective and efficient transformations
c) To maximize waste production
d) To increase energy consumption
Answer: b
68. Which of the following is an example of a green chelating agent?
a) EDTA
b) Gluconic acid
c) Nitrilotriacetic acid
d) Diethylenetriaminepentaacetic acid
Answer: b
69. What is the main advantage of using ultrasound in green chemistry?
a) It increases energy consumption
b) It can enhance reaction rates and reduce the need for harsh conditions
c) It maximizes solvent use
d) It decreases reaction selectivity
Answer: b
70. Which of the following is NOT a typical characteristic of a green chemical product?
a) Biodegradability
b) Low toxicity
c) High bioaccumulation potential
d) Derived from renewable resources
Answer: c
71. If a process has an E-factor of 5 and generates 150 kg of waste, how much product is
formed?
a) 20 kg
b) 25 kg
c) 30 kg
d) 35 kg
Answer: c
72. A reaction has an atom economy of 70%. If 200 grams of reactants are used, what is the
maximum possible mass of product?
a) 120 grams
b) 130 grams
c) 140 grams
d) 150 grams
Answer: c
73. If a process has a mass intensity (MI) of 25 and produces 20 kg of product, what is the total
mass of materials used?
a) 400 kg
b) 450 kg
c) 500 kg
d) 550 kg
Answer: c
74. A reaction has a carbon efficiency of 80%. If the product contains 80 carbon atoms, how
many carbon atoms were present in the reactants?
a) 80
b) 90
c) 100
d) 110
Answer: c
75. If a process uses 4 kg of solvent to produce 2 kg of product, what is the solvent intensity?
a) 1
b) 2
c) 3
d) 4
Answer: b
76. A reaction has an E-factor of 2 and produces 30 kg of product. How much waste is
generated?
a) 45 kg
b) 60 kg
c) 75 kg
d) 90 kg
Answer: b
77. If a process has a reaction mass efficiency (RME) of 65% and produces 130 grams of
product, how many grams of reactants were used?
a) 180 grams
b) 190 grams
c) 200 grams
d) 210 grams
Answer: c
78. A reaction has an atom economy of 90% and a yield of 70%. What is the atom utilization?
a) 53%
b) 63%
c) 73%
d) 83%
Answer: b
79. If a process uses 0.2 kg of catalyst to produce 40 kg of product, what is the catalyst
intensity?
a) 0.005
b) 0.01
c) 0.015
d) 0.02
Answer: a
80. A reaction has a carbon efficiency of 75%. If the reactants contain 160 moles of carbon, how
many moles of carbon are incorporated into the product?
a) 100 moles
b) 110 moles
c) 120 moles
d) 130 moles
Answer: c
81. What is the primary goal of using photocatalysis in green chemistry?
a) To increase energy consumption
b) To utilize light as a clean energy source for chemical reactions
c) To maximize waste production
d) To increase the use of toxic catalysts
Answer: b
A reaction has a carbon efficiency of 75%. If the product contains 60 carbon atoms, how many
carbon atoms were present in the reactants?
a) 60
b) 70
c) 80
d) 90
Answer: c
55. If a process uses 3 kg of solvent to produce 2 kg of product, what is the solvent intensity?
a) 0.67
b) 1.5
c) 2
d) 3
Answer: b
56. A reaction has an E-factor of 3 and produces 40 kg of waste. How much product is formed?
a) 10 kg
b) 13.33 kg
c) 15 kg
d) 20 kg
Answer: b
57. If a process has a reaction mass efficiency (RME) of 70% and uses 200 grams of reactants,
how many grams of product are formed?
a) 120 grams
b) 130 grams
c) 140 grams
d) 150 grams
Answer: c
58. A reaction has an atom economy of 85% and a yield of 75%. What is the atom utilization?
a) 53.75%
b) 63.75%
c) 73.75%
d) 83.75%
Answer: b
59. If a process uses 0.5 kg of catalyst to produce 50 kg of product, what is the catalyst
intensity?
a) 0.01
b) 0.02
c) 0.05
d) 0.1
Answer: a
60. A reaction has a carbon efficiency of 60%. If the reactants contain 200 moles of carbon, how
many moles of carbon are incorporated into the product?
a) 100 moles
b) 120 moles
c) 140 moles
d) 160 moles
Answer: b
61. What is the primary goal of using renewable feedstocks in green chemistry?
a) To increase production costs
b) To reduce dependence on fossil resources
c) To decrease product quality
d) To increase waste generation
Answer: b
62. Which of the following is NOT a typical characteristic of a green solvent?
a) Low toxicity
b) High volatility
c) Biodegradability
d) Derived from renewable resources
Answer: b
63. What is the main advantage of using microreactors in green chemistry?
a) They increase energy consumption
b) They allow for better heat and mass transfer
c) They maximize solvent use
d) They decrease reaction selectivity
Answer: b
64. Which of the following is an example of a green oxidizing agent?
a) Chromium trioxide
b) Oxygen
c) Potassium permanganate
d) Lead tetraacetate
Answer: b
65. What is the main advantage of using phase transfer catalysis in green chemistry?
a) It increases solvent use
b) It allows reactions between immiscible reactants without organic solvents
c) It decreases reaction rates
d) It increases waste production
Answer: b
66. Which of the following is NOT a common method for improving energy efficiency in chemical
processes?
a) Process intensification
b) Heat integration
c) Use of microwaves
d) Increasing reaction temperature
Answer: d
67. What is the primary goal of using biocatalysts in green chemistry?
a) To increase the use of organic solvents
b) To utilize enzymes for selective and efficient transformations
c) To maximize waste production
d) To increase energy consumption
Answer: b
68. Which of the following is an example of a green chelating agent?
a) EDTA
b) Gluconic acid
c) Nitrilotriacetic acid
d) Diethylenetriaminepentaacetic acid
Answer: b
69. What is the main advantage of using ultrasound in green chemistry?
a) It increases energy consumption
b) It can enhance reaction rates and reduce the need for harsh conditions
c) It maximizes solvent use
d) It decreases reaction selectivity
Answer: b
70. Which of the following is NOT a typical characteristic of a green chemical product?
a) Biodegradability
b) Low toxicity
c) High bioaccumulation potential
d) Derived from renewable resources
Answer: c
71. If a process has an E-factor of 5 and generates 150 kg of waste, how much product is
formed?
a) 20 kg
b) 25 kg
c) 30 kg
d) 35 kg
Answer: c
72. A reaction has an atom economy of 70%. If 200 grams of reactants are used, what is the
maximum possible mass of product?
a) 120 grams
b) 130 grams
c) 140 grams
d) 150 grams
Answer: c
73. If a process has a mass intensity (MI) of 25 and produces 20 kg of product, what is the total
mass of materials used?
a) 400 kg
b) 450 kg
c) 500 kg
d) 550 kg
Answer: c
74. A reaction has a carbon efficiency of 80%. If the product contains 80 carbon atoms, how
many carbon atoms were present in the reactants?
a) 80
b) 90
c) 100
d) 110
Answer: c
75. If a process uses 4 kg of solvent to produce 2 kg of product, what is the solvent intensity?
a) 1
b) 2
c) 3
d) 4
Answer: b
76. A reaction has an E-factor of 2 and produces 30 kg of product. How much waste is
generated?
a) 45 kg
b) 60 kg
c) 75 kg
d) 90 kg
Answer: b
77. If a process has a reaction mass efficiency (RME) of 65% and produces 130 grams of
product, how many grams of reactants were used?
a) 180 grams
b) 190 grams
c) 200 grams
d) 210 grams
Answer: c
78. A reaction has an atom economy of 90% and a yield of 70%. What is the atom utilization?
a) 53%
b) 63%
c) 73%
d) 83%
Answer: b
79. If a process uses 0.2 kg of catalyst to produce 40 kg of product, what is the catalyst
intensity?
a) 0.005
b) 0.01
c) 0.015
d) 0.02
Answer: a
80. A reaction has a carbon efficiency of 75%. If the reactants contain 160 moles of carbon, how
many moles of carbon are incorporated into the product?
a) 100 moles
b) 110 moles
c) 120 moles
d) 130 moles
Answer: c
81. What is the primary goal of using photocatalysis in green chemistry?
a) To increase energy consumption
b) To utilize light as a clean energy source for chemical reactions
c) To maximize waste production
d) To increase the use of toxic catalysts
Answer: b
82. Which of the following is NOT a common method for reducing the environmental impact of
chemical processes?
a) Use of renewable feedstocks
b) Maximizing solvent use
c) Process intensification
d) Catalytic reactions
Answer: b
83. What is the main advantage of using supercritical fluids in green chemistry?
a) They are highly toxic
b) They can replace organic solvents and are easily removed
c) They increase energy consumption
d) They decrease reaction selectivity
Answer: b
84. Which of the following is an example of a green reducing agent?
a) Lithium aluminum hydride
b) Sodium cyanoborohydride
c) Zinc dust
d) Tin(II) chloride
Answer: c
85. What is the primary goal of using membrane technology in green chemistry?
a) To increase solvent use
b) To enable efficient separations with reduced energy consumption
c) To maximize waste production
d) To decrease product purity
Answer: b
86. Which of the following is NOT a typical characteristic of a green catalyst?
a) High activity
b) Low selectivity
c) Recyclability
d) Derived from abundant materials
Answer: b
87. What is the main advantage of using ball milling in green chemistry?
a) It increases solvent use
b) It enables solvent-free or low-solvent mechanochemical reactions
c) It decreases reaction rates
d) It increases energy consumption
Answer: b
88. Which of the following is an example of a bio-based solvent?
a) Dichloromethane
b) 2-Methyltetrahydrofuran
c) Hexane
d) Diethyl ether
Answer: b
89. What is the primary goal of using process analytical technology (PAT) in green chemistry?
a) To increase waste production
b) To enable real-time monitoring and control of processes for improved efficiency
c) To maximize energy consumption
d) To decrease product quality
Answer: b
90. Which of the following is NOT a common method for improving atom economy in chemical
processes?
a) Use of catalysts
b) Stoichiometric reactions
c) Avoiding protection/deprotection steps
d) Maximizing the use of auxiliary substances
Answer: d
91. If a process has an E-factor of 3 and produces 40 kg of product, how much waste is
generated?
a) 80 kg
b) 100 kg
c) 120 kg
d) 140 kg
Answer: c
92. A reaction has an atom economy of 85%. If 150 grams of reactants are used, what is the
maximum possible mass of product?
a) 117.5 grams
b) 127.5 grams
c) 137.5 grams
d) 147.5 grams
Answer: b
93. If a process has a mass intensity (MI) of 30 and uses 600 kg of materials, how much product
is formed?
a) 15 kg
b) 20 kg
c) 25 kg
d) 30 kg
Answer: b
94. A reaction has a carbon efficiency of 70%. If the product contains 70 carbon atoms, how
many carbon atoms were present in the reactants?
a) 80
b) 90
c) 100
d) 110
Answer: c
A reaction has a carbon efficiency of 75%. If the product contains 60 carbon atoms, how many
carbon atoms were present in the reactants?
a) 60
b) 70
c) 80
d) 90
Answer: c
55. If a process uses 3 kg of solvent to produce 2 kg of product, what is the solvent intensity?
a) 0.67
b) 1.5
c) 2
d) 3
Answer: b
56. A reaction has an E-factor of 3 and produces 40 kg of waste. How much product is formed?
a) 10 kg
b) 13.33 kg
c) 15 kg
d) 20 kg
Answer: b
57. If a process has a reaction mass efficiency (RME) of 70% and uses 200 grams of reactants,
how many grams of product are formed?
a) 120 grams
b) 130 grams
c) 140 grams
d) 150 grams
Answer: c
58. A reaction has an atom economy of 85% and a yield of 75%. What is the atom utilization?
a) 53.75%
b) 63.75%
c) 73.75%
d) 83.75%
Answer: b
59. If a process uses 0.5 kg of catalyst to produce 50 kg of product, what is the catalyst
intensity?
a) 0.01
b) 0.02
c) 0.05
d) 0.1
Answer: a
60. A reaction has a carbon efficiency of 60%. If the reactants contain 200 moles of carbon, how
many moles of carbon are incorporated into the product?
a) 100 moles
b) 120 moles
c) 140 moles
d) 160 moles
Answer: b
61. What is the primary goal of using renewable feedstocks in green chemistry?
a) To increase production costs
b) To reduce dependence on fossil resources
c) To decrease product quality
d) To increase waste generation
Answer: b
62. Which of the following is NOT a typical characteristic of a green solvent?
a) Low toxicity
b) High volatility
c) Biodegradability
d) Derived from renewable resources
Answer: b
63. What is the main advantage of using microreactors in green chemistry?
a) They increase energy consumption
b) They allow for better heat and mass transfer
c) They maximize solvent use
d) They decrease reaction selectivity
Answer: b
64. Which of the following is an example of a green oxidizing agent?
a) Chromium trioxide
b) Oxygen
c) Potassium permanganate
d) Lead tetraacetate
Answer: b
65. What is the main advantage of using phase transfer catalysis in green chemistry?
a) It increases solvent use
b) It allows reactions between immiscible reactants without organic solvents
c) It decreases reaction rates
d) It increases waste production
Answer: b
66. Which of the following is NOT a common method for improving energy efficiency in chemical
processes?
a) Process intensification
b) Heat integration
c) Use of microwaves
d) Increasing reaction temperature
Answer: d
67. What is the primary goal of using biocatalysts in green chemistry?
a) To increase the use of organic solvents
b) To utilize enzymes for selective and efficient transformations
c) To maximize waste production
d) To increase energy consumption
Answer: b
68. Which of the following is an example of a green chelating agent?
a) EDTA
b) Gluconic acid
c) Nitrilotriacetic acid
d) Diethylenetriaminepentaacetic acid
Answer: b
69. What is the main advantage of using ultrasound in green chemistry?
a) It increases energy consumption
b) It can enhance reaction rates and reduce the need for harsh conditions
c) It maximizes solvent use
d) It decreases reaction selectivity
Answer: b
70. Which of the following is NOT a typical characteristic of a green chemical product?
a) Biodegradability
b) Low toxicity
c) High bioaccumulation potential
d) Derived from renewable resources
Answer: c
71. If a process has an E-factor of 5 and generates 150 kg of waste, how much product is
formed?
a) 20 kg
b) 25 kg
c) 30 kg
d) 35 kg
Answer: c
72. A reaction has an atom economy of 70%. If 200 grams of reactants are used, what is the
maximum possible mass of product?
a) 120 grams
b) 130 grams
c) 140 grams
d) 150 grams
Answer: c
73. If a process has a mass intensity (MI) of 25 and produces 20 kg of product, what is the total
mass of materials used?
a) 400 kg
b) 450 kg
c) 500 kg
d) 550 kg
Answer: c
74. A reaction has a carbon efficiency of 80%. If the product contains 80 carbon atoms, how
many carbon atoms were present in the reactants?
a) 80
b) 90
c) 100
d) 110
Answer: c
75. If a process uses 4 kg of solvent to produce 2 kg of product, what is the solvent intensity?
a) 1
b) 2
c) 3
d) 4
Answer: b
76. A reaction has an E-factor of 2 and produces 30 kg of product. How much waste is
generated?
a) 45 kg
b) 60 kg
c) 75 kg
d) 90 kg
Answer: b
77. If a process has a reaction mass efficiency (RME) of 65% and produces 130 grams of
product, how many grams of reactants were used?
a) 180 grams
b) 190 grams
c) 200 grams
d) 210 grams
Answer: c
78. A reaction has an atom economy of 90% and a yield of 70%. What is the atom utilization?
a) 53%
b) 63%
c) 73%
d) 83%
Answer: b
79. If a process uses 0.2 kg of catalyst to produce 40 kg of product, what is the catalyst
intensity?
a) 0.005
b) 0.01
c) 0.015
d) 0.02
Answer: a
80. A reaction has a carbon efficiency of 75%. If the reactants contain 160 moles of carbon, how
many moles of carbon are incorporated into the product?
a) 100 moles
b) 110 moles
c) 120 moles
d) 130 moles
Answer: c
81. What is the primary goal of using photocatalysis in green chemistry?
a) To increase energy consumption
b) To utilize light as a clean energy source for chemical reactions
c) To maximize waste production
d) To increase the use of toxic catalysts
Answer: b
82. Which of the following is NOT a common method for reducing the environmental impact of
chemical processes?
a) Use of renewable feedstocks
b) Maximizing solvent use
c) Process intensification
d) Catalytic reactions
Answer: b
83. What is the main advantage of using supercritical fluids in green chemistry?
a) They are highly toxic
b) They can replace organic solvents and are easily removed
c) They increase energy consumption
d) They decrease reaction selectivity
Answer: b
84. Which of the following is an example of a green reducing agent?
a) Lithium aluminum hydride
b) Sodium cyanoborohydride
c) Zinc dust
d) Tin(II) chloride
Answer: c
85. What is the primary goal of using membrane technology in green chemistry?
a) To increase solvent use
b) To enable efficient separations with reduced energy consumption
c) To maximize waste production
d) To decrease product purity
Answer: b
86. Which of the following is NOT a typical characteristic of a green catalyst?
a) High activity
b) Low selectivity
c) Recyclability
d) Derived from abundant materials
Answer: b
87. What is the main advantage of using ball milling in green chemistry?
a) It increases solvent use
b) It enables solvent-free or low-solvent mechanochemical reactions
c) It decreases reaction rates
d) It increases energy consumption
Answer: b
88. Which of the following is an example of a bio-based solvent?
a) Dichloromethane
b) 2-Methyltetrahydrofuran
c) Hexane
d) Diethyl ether
Answer: b
89. What is the primary goal of using process analytical technology (PAT) in green chemistry?
a) To increase waste production
b) To enable real-time monitoring and control of processes for improved efficiency
c) To maximize energy consumption
d) To decrease product quality
Answer: b
90. Which of the following is NOT a common method for improving atom economy in chemical
processes?
a) Use of catalysts
b) Stoichiometric reactions
c) Avoiding protection/deprotection steps
d) Maximizing the use of auxiliary substances
Answer: d
91. If a process has an E-factor of 3 and produces 40 kg of product, how much waste is
generated?
a) 80 kg
b) 100 kg
c) 120 kg
d) 140 kg
Answer: c
92. A reaction has an atom economy of 85%. If 150 grams of reactants are used, what is the
maximum possible mass of product?
a) 117.5 grams
b) 127.5 grams
c) 137.5 grams
d) 147.5 grams
Answer: b
93. If a process has a mass intensity (MI) of 30 and uses 600 kg of materials, how much product
is formed?
a) 15 kg
b) 20 kg
c) 25 kg
d) 30 kg
Answer: b
94. A reaction has a carbon efficiency of 70%. If the product contains 70 carbon atoms, how
many carbon atoms were present in the reactants?
a) 80
b) 90
c) 100
d) 110
Answer: c
A reaction has a carbon efficiency of 75%. If the product contains 60 carbon atoms, how many
carbon atoms were present in the reactants?
a) 60
b) 70
c) 80
d) 90
Answer: c
55. If a process uses 3 kg of solvent to produce 2 kg of product, what is the solvent intensity?
a) 0.67
b) 1.5
c) 2
d) 3
Answer: b
56. A reaction has an E-factor of 3 and produces 40 kg of waste. How much product is formed?
a) 10 kg
b) 13.33 kg
c) 15 kg
d) 20 kg
Answer: b
57. If a process has a reaction mass efficiency (RME) of 70% and uses 200 grams of reactants,
how many grams of product are formed?
a) 120 grams
b) 130 grams
c) 140 grams
d) 150 grams
Answer: c
58. A reaction has an atom economy of 85% and a yield of 75%. What is the atom utilization?
a) 53.75%
b) 63.75%
c) 73.75%
d) 83.75%
Answer: b
59. If a process uses 0.5 kg of catalyst to produce 50 kg of product, what is the catalyst
intensity?
a) 0.01
b) 0.02
c) 0.05
d) 0.1
Answer: a
60. A reaction has a carbon efficiency of 60%. If the reactants contain 200 moles of carbon, how
many moles of carbon are incorporated into the product?
a) 100 moles
b) 120 moles
c) 140 moles
d) 160 moles
Answer: b
61. What is the primary goal of using renewable feedstocks in green chemistry?
a) To increase production costs
b) To reduce dependence on fossil resources
c) To decrease product quality
d) To increase waste generation
Answer: b
62. Which of the following is NOT a typical characteristic of a green solvent?
a) Low toxicity
b) High volatility
c) Biodegradability
d) Derived from renewable resources
Answer: b
63. What is the main advantage of using microreactors in green chemistry?
a) They increase energy consumption
b) They allow for better heat and mass transfer
c) They maximize solvent use
d) They decrease reaction selectivity
Answer: b
64. Which of the following is an example of a green oxidizing agent?
a) Chromium trioxide
b) Oxygen
c) Potassium permanganate
d) Lead tetraacetate
Answer: b
65. What is the main advantage of using phase transfer catalysis in green chemistry?
a) It increases solvent use
b) It allows reactions between immiscible reactants without organic solvents
c) It decreases reaction rates
d) It increases waste production
Answer: b
66. Which of the following is NOT a common method for improving energy efficiency in chemical
processes?
a) Process intensification
b) Heat integration
c) Use of microwaves
d) Increasing reaction temperature
Answer: d
67. What is the primary goal of using biocatalysts in green chemistry?
a) To increase the use of organic solvents
b) To utilize enzymes for selective and efficient transformations
c) To maximize waste production
d) To increase energy consumption
Answer: b
68. Which of the following is an example of a green chelating agent?
a) EDTA
b) Gluconic acid
c) Nitrilotriacetic acid
d) Diethylenetriaminepentaacetic acid
Answer: b
69. What is the main advantage of using ultrasound in green chemistry?
a) It increases energy consumption
b) It can enhance reaction rates and reduce the need for harsh conditions
c) It maximizes solvent use
d) It decreases reaction selectivity
Answer: b
70. Which of the following is NOT a typical characteristic of a green chemical product?
a) Biodegradability
b) Low toxicity
c) High bioaccumulation potential
d) Derived from renewable resources
Answer: c
71. If a process has an E-factor of 5 and generates 150 kg of waste, how much product is
formed?
a) 20 kg
b) 25 kg
c) 30 kg
d) 35 kg
Answer: c
72. A reaction has an atom economy of 70%. If 200 grams of reactants are used, what is the
maximum possible mass of product?
a) 120 grams
b) 130 grams
c) 140 grams
d) 150 grams
Answer: c
73. If a process has a mass intensity (MI) of 25 and produces 20 kg of product, what is the total
mass of materials used?
a) 400 kg
b) 450 kg
c) 500 kg
d) 550 kg
Answer: c
74. A reaction has a carbon efficiency of 80%. If the product contains 80 carbon atoms, how
many carbon atoms were present in the reactants?
a) 80
b) 90
c) 100
d) 110
Answer: c
75. If a process uses 4 kg of solvent to produce 2 kg of product, what is the solvent intensity?
a) 1
b) 2
c) 3
d) 4
Answer: b
76. A reaction has an E-factor of 2 and produces 30 kg of product. How much waste is
generated?
a) 45 kg
b) 60 kg
c) 75 kg
d) 90 kg
Answer: b
77. If a process has a reaction mass efficiency (RME) of 65% and produces 130 grams of
product, how many grams of reactants were used?
a) 180 grams
b) 190 grams
c) 200 grams
d) 210 grams
Answer: c
78. A reaction has an atom economy of 90% and a yield of 70%. What is the atom utilization?
a) 53%
b) 63%
c) 73%
d) 83%
Answer: b
79. If a process uses 0.2 kg of catalyst to produce 40 kg of product, what is the catalyst
intensity?
a) 0.005
b) 0.01
c) 0.015
d) 0.02
Answer: a
80. A reaction has a carbon efficiency of 75%. If the reactants contain 160 moles of carbon, how
many moles of carbon are incorporated into the product?
a) 100 moles
b) 110 moles
c) 120 moles
d) 130 moles
Answer: c
81. What is the primary goal of using photocatalysis in green chemistry?
a) To increase energy consumption
b) To utilize light as a clean energy source for chemical reactions
c) To maximize waste production
d) To increase the use of toxic catalysts
Answer: b
82. Which of the following is NOT a common method for reducing the environmental impact of
chemical processes?
a) Use of renewable feedstocks
b) Maximizing solvent use
c) Process intensification
d) Catalytic reactions
Answer: b
83. What is the main advantage of using supercritical fluids in green chemistry?
a) They are highly toxic
b) They can replace organic solvents and are easily removed
c) They increase energy consumption
d) They decrease reaction selectivity
Answer: b
84. Which of the following is an example of a green reducing agent?
a) Lithium aluminum hydride
b) Sodium cyanoborohydride
c) Zinc dust
d) Tin(II) chloride
Answer: c
85. What is the primary goal of using membrane technology in green chemistry?
a) To increase solvent use
b) To enable efficient separations with reduced energy consumption
c) To maximize waste production
d) To decrease product purity
Answer: b
86. Which of the following is NOT a typical characteristic of a green catalyst?
a) High activity
b) Low selectivity
c) Recyclability
d) Derived from abundant materials
Answer: b
87. What is the main advantage of using ball milling in green chemistry?
a) It increases solvent use
b) It enables solvent-free or low-solvent mechanochemical reactions
c) It decreases reaction rates
d) It increases energy consumption
Answer: b
88. Which of the following is an example of a bio-based solvent?
a) Dichloromethane
b) 2-Methyltetrahydrofuran
c) Hexane
d) Diethyl ether
Answer: b
89. What is the primary goal of using process analytical technology (PAT) in green chemistry?
a) To increase waste production
b) To enable real-time monitoring and control of processes for improved efficiency
c) To maximize energy consumption
d) To decrease product quality
Answer: b
90. Which of the following is NOT a common method for improving atom economy in chemical
processes?
a) Use of catalysts
b) Stoichiometric reactions
c) Avoiding protection/deprotection steps
d) Maximizing the use of auxiliary substances
Answer: d
91. If a process has an E-factor of 3 and produces 40 kg of product, how much waste is
generated?
a) 80 kg
b) 100 kg
c) 120 kg
d) 140 kg
Answer: c
92. A reaction has an atom economy of 85%. If 150 grams of reactants are used, what is the
maximum possible mass of product?
a) 117.5 grams
b) 127.5 grams
c) 137.5 grams
d) 147.5 grams
Answer: b
93. If a process has a mass intensity (MI) of 30 and uses 600 kg of materials, how much product
is formed?
a) 15 kg
b) 20 kg
c) 25 kg
d) 30 kg
Answer: b
94. A reaction has a carbon efficiency of 70%. If the product contains 70 carbon atoms, how
many carbon atoms were present in the reactants?
a) 80
b) 90
c) 100
d) 110
Answer: c
A reaction has a carbon efficiency of 75%. If the product contains 60 carbon atoms, how many
carbon atoms were present in the reactants?
a) 60
b) 70
c) 80
d) 90
Answer: c
55. If a process uses 3 kg of solvent to produce 2 kg of product, what is the solvent intensity?
a) 0.67
b) 1.5
c) 2
d) 3
Answer: b
56. A reaction has an E-factor of 3 and produces 40 kg of waste. How much product is formed?
a) 10 kg
b) 13.33 kg
c) 15 kg
d) 20 kg
Answer: b
57. If a process has a reaction mass efficiency (RME) of 70% and uses 200 grams of reactants,
how many grams of product are formed?
a) 120 grams
b) 130 grams
c) 140 grams
d) 150 grams
Answer: c
58. A reaction has an atom economy of 85% and a yield of 75%. What is the atom utilization?
a) 53.75%
b) 63.75%
c) 73.75%
d) 83.75%
Answer: b
59. If a process uses 0.5 kg of catalyst to produce 50 kg of product, what is the catalyst
intensity?
a) 0.01
b) 0.02
c) 0.05
d) 0.1
Answer: a
60. A reaction has a carbon efficiency of 60%. If the reactants contain 200 moles of carbon, how
many moles of carbon are incorporated into the product?
a) 100 moles
b) 120 moles
c) 140 moles
d) 160 moles
Answer: b
61. What is the primary goal of using renewable feedstocks in green chemistry?
a) To increase production costs
b) To reduce dependence on fossil resources
c) To decrease product quality
d) To increase waste generation
Answer: b
62. Which of the following is NOT a typical characteristic of a green solvent?
a) Low toxicity
b) High volatility
c) Biodegradability
d) Derived from renewable resources
Answer: b
63. What is the main advantage of using microreactors in green chemistry?
a) They increase energy consumption
b) They allow for better heat and mass transfer
c) They maximize solvent use
d) They decrease reaction selectivity
Answer: b
64. Which of the following is an example of a green oxidizing agent?
a) Chromium trioxide
b) Oxygen
c) Potassium permanganate
d) Lead tetraacetate
Answer: b
65. What is the main advantage of using phase transfer catalysis in green chemistry?
a) It increases solvent use
b) It allows reactions between immiscible reactants without organic solvents
c) It decreases reaction rates
d) It increases waste production
Answer: b
66. Which of the following is NOT a common method for improving energy efficiency in chemical
processes?
a) Process intensification
b) Heat integration
c) Use of microwaves
d) Increasing reaction temperature
Answer: d
67. What is the primary goal of using biocatalysts in green chemistry?
a) To increase the use of organic solvents
b) To utilize enzymes for selective and efficient transformations
c) To maximize waste production
d) To increase energy consumption
Answer: b
68. Which of the following is an example of a green chelating agent?
a) EDTA
b) Gluconic acid
c) Nitrilotriacetic acid
d) Diethylenetriaminepentaacetic acid
Answer: b
69. What is the main advantage of using ultrasound in green chemistry?
a) It increases energy consumption
b) It can enhance reaction rates and reduce the need for harsh conditions
c) It maximizes solvent use
d) It decreases reaction selectivity
Answer: b
70. Which of the following is NOT a typical characteristic of a green chemical product?
a) Biodegradability
b) Low toxicity
c) High bioaccumulation potential
d) Derived from renewable resources
Answer: c
71. If a process has an E-factor of 5 and generates 150 kg of waste, how much product is
formed?
a) 20 kg
b) 25 kg
c) 30 kg
d) 35 kg
Answer: c
72. A reaction has an atom economy of 70%. If 200 grams of reactants are used, what is the
maximum possible mass of product?
a) 120 grams
b) 130 grams
c) 140 grams
d) 150 grams
Answer: c
73. If a process has a mass intensity (MI) of 25 and produces 20 kg of product, what is the total
mass of materials used?
a) 400 kg
b) 450 kg
c) 500 kg
d) 550 kg
Answer: c
74. A reaction has a carbon efficiency of 80%. If the product contains 80 carbon atoms, how
many carbon atoms were present in the reactants?
a) 80
b) 90
c) 100
d) 110
Answer: c
75. If a process uses 4 kg of solvent to produce 2 kg of product, what is the solvent intensity?
a) 1
b) 2
c) 3
d) 4
Answer: b
76. A reaction has an E-factor of 2 and produces 30 kg of product. How much waste is
generated?
a) 45 kg
b) 60 kg
c) 75 kg
d) 90 kg
Answer: b
77. If a process has a reaction mass efficiency (RME) of 65% and produces 130 grams of
product, how many grams of reactants were used?
a) 180 grams
b) 190 grams
c) 200 grams
d) 210 grams
Answer: c
78. A reaction has an atom economy of 90% and a yield of 70%. What is the atom utilization?
a) 53%
b) 63%
c) 73%
d) 83%
Answer: b
79. If a process uses 0.2 kg of catalyst to produce 40 kg of product, what is the catalyst
intensity?
a) 0.005
b) 0.01
c) 0.015
d) 0.02
Answer: a
80. A reaction has a carbon efficiency of 75%. If the reactants contain 160 moles of carbon, how
many moles of carbon are incorporated into the product?
a) 100 moles
b) 110 moles
c) 120 moles
d) 130 moles
Answer: c
81. What is the primary goal of using photocatalysis in green chemistry?
a) To increase energy consumption
b) To utilize light as a clean energy source for chemical reactions
c) To maximize waste production
d) To increase the use of toxic catalysts
Answer: b
82. Which of the following is NOT a common method for reducing the environmental impact of
chemical processes?
a) Use of renewable feedstocks
b) Maximizing solvent use
c) Process intensification
d) Catalytic reactions
Answer: b
83. What is the main advantage of using supercritical fluids in green chemistry?
a) They are highly toxic
b) They can replace organic solvents and are easily removed
c) They increase energy consumption
d) They decrease reaction selectivity
Answer: b
84. Which of the following is an example of a green reducing agent?
a) Lithium aluminum hydride
b) Sodium cyanoborohydride
c) Zinc dust
d) Tin(II) chloride
Answer: c
85. What is the primary goal of using membrane technology in green chemistry?
a) To increase solvent use
b) To enable efficient separations with reduced energy consumption
c) To maximize waste production
d) To decrease product purity
Answer: b
86. Which of the following is NOT a typical characteristic of a green catalyst?
a) High activity
b) Low selectivity
c) Recyclability
d) Derived from abundant materials
Answer: b
87. What is the main advantage of using ball milling in green chemistry?
a) It increases solvent use
b) It enables solvent-free or low-solvent mechanochemical reactions
c) It decreases reaction rates
d) It increases energy consumption
Answer: b
88. Which of the following is an example of a bio-based solvent?
a) Dichloromethane
b) 2-Methyltetrahydrofuran
c) Hexane
d) Diethyl ether
Answer: b
89. What is the primary goal of using process analytical technology (PAT) in green chemistry?
a) To increase waste production
b) To enable real-time monitoring and control of processes for improved efficiency
c) To maximize energy consumption
d) To decrease product quality
Answer: b
90. Which of the following is NOT a common method for improving atom economy in chemical
processes?
a) Use of catalysts
b) Stoichiometric reactions
c) Avoiding protection/deprotection steps
d) Maximizing the use of auxiliary substances
Answer: d
91. If a process has an E-factor of 3 and produces 40 kg of product, how much waste is
generated?
a) 80 kg
b) 100 kg
c) 120 kg
d) 140 kg
Answer: c
92. A reaction has an atom economy of 85%. If 150 grams of reactants are used, what is the
maximum possible mass of product?
a) 117.5 grams
b) 127.5 grams
c) 137.5 grams
d) 147.5 grams
Answer: b
93. If a process has a mass intensity (MI) of 30 and uses 600 kg of materials, how much product
is formed?
a) 15 kg
b) 20 kg
c) 25 kg
d) 30 kg
Answer: b
94. A reaction has a carbon efficiency of 70%. If the product contains 70 carbon atoms, how
many carbon atoms were present in the reactants?
a) 80
b) 90
c) 100
d) 110
Answer: c
A reaction has a carbon efficiency of 75%. If the product contains 60 carbon atoms, how many
carbon atoms were present in the reactants?
a) 60
b) 70
c) 80
d) 90
Answer: c
55. If a process uses 3 kg of solvent to produce 2 kg of product, what is the solvent intensity?
a) 0.67
b) 1.5
c) 2
d) 3
Answer: b
56. A reaction has an E-factor of 3 and produces 40 kg of waste. How much product is formed?
a) 10 kg
b) 13.33 kg
c) 15 kg
d) 20 kg
Answer: b
57. If a process has a reaction mass efficiency (RME) of 70% and uses 200 grams of reactants,
how many grams of product are formed?
a) 120 grams
b) 130 grams
c) 140 grams
d) 150 grams
Answer: c
58. A reaction has an atom economy of 85% and a yield of 75%. What is the atom utilization?
a) 53.75%
b) 63.75%
c) 73.75%
d) 83.75%
Answer: b
59. If a process uses 0.5 kg of catalyst to produce 50 kg of product, what is the catalyst
intensity?
a) 0.01
b) 0.02
c) 0.05
d) 0.1
Answer: a
60. A reaction has a carbon efficiency of 60%. If the reactants contain 200 moles of carbon, how
many moles of carbon are incorporated into the product?
a) 100 moles
b) 120 moles
c) 140 moles
d) 160 moles
Answer: b
61. What is the primary goal of using renewable feedstocks in green chemistry?
a) To increase production costs
b) To reduce dependence on fossil resources
c) To decrease product quality
d) To increase waste generation
Answer: b
62. Which of the following is NOT a typical characteristic of a green solvent?
a) Low toxicity
b) High volatility
c) Biodegradability
d) Derived from renewable resources
Answer: b
63. What is the main advantage of using microreactors in green chemistry?
a) They increase energy consumption
b) They allow for better heat and mass transfer
c) They maximize solvent use
d) They decrease reaction selectivity
Answer: b
64. Which of the following is an example of a green oxidizing agent?
a) Chromium trioxide
b) Oxygen
c) Potassium permanganate
d) Lead tetraacetate
Answer: b
65. What is the main advantage of using phase transfer catalysis in green chemistry?
a) It increases solvent use
b) It allows reactions between immiscible reactants without organic solvents
c) It decreases reaction rates
d) It increases waste production
Answer: b
66. Which of the following is NOT a common method for improving energy efficiency in chemical
processes?
a) Process intensification
b) Heat integration
c) Use of microwaves
d) Increasing reaction temperature
Answer: d
67. What is the primary goal of using biocatalysts in green chemistry?
a) To increase the use of organic solvents
b) To utilize enzymes for selective and efficient transformations
c) To maximize waste production
d) To increase energy consumption
Answer: b
68. Which of the following is an example of a green chelating agent?
a) EDTA
b) Gluconic acid
c) Nitrilotriacetic acid
d) Diethylenetriaminepentaacetic acid
Answer: b
69. What is the main advantage of using ultrasound in green chemistry?
a) It increases energy consumption
b) It can enhance reaction rates and reduce the need for harsh conditions
c) It maximizes solvent use
d) It decreases reaction selectivity
Answer: b
70. Which of the following is NOT a typical characteristic of a green chemical product?
a) Biodegradability
b) Low toxicity
c) High bioaccumulation potential
d) Derived from renewable resources
Answer: c
71. If a process has an E-factor of 5 and generates 150 kg of waste, how much product is
formed?
a) 20 kg
b) 25 kg
c) 30 kg
d) 35 kg
Answer: c
72. A reaction has an atom economy of 70%. If 200 grams of reactants are used, what is the
maximum possible mass of product?
a) 120 grams
b) 130 grams
c) 140 grams
d) 150 grams
Answer: c
73. If a process has a mass intensity (MI) of 25 and produces 20 kg of product, what is the total
mass of materials used?
a) 400 kg
b) 450 kg
c) 500 kg
d) 550 kg
Answer: c
74. A reaction has a carbon efficiency of 80%. If the product contains 80 carbon atoms, how
many carbon atoms were present in the reactants?
a) 80
b) 90
c) 100
d) 110
Answer: c
75. If a process uses 4 kg of solvent to produce 2 kg of product, what is the solvent intensity?
a) 1
b) 2
c) 3
d) 4
Answer: b
76. A reaction has an E-factor of 2 and produces 30 kg of product. How much waste is
generated?
a) 45 kg
b) 60 kg
c) 75 kg
d) 90 kg
Answer: b
77. If a process has a reaction mass efficiency (RME) of 65% and produces 130 grams of
product, how many grams of reactants were used?
a) 180 grams
b) 190 grams
c) 200 grams
d) 210 grams
Answer: c
78. A reaction has an atom economy of 90% and a yield of 70%. What is the atom utilization?
a) 53%
b) 63%
c) 73%
d) 83%
Answer: b
79. If a process uses 0.2 kg of catalyst to produce 40 kg of product, what is the catalyst
intensity?
a) 0.005
b) 0.01
c) 0.015
d) 0.02
Answer: a
80. A reaction has a carbon efficiency of 75%. If the reactants contain 160 moles of carbon, how
many moles of carbon are incorporated into the product?
a) 100 moles
b) 110 moles
c) 120 moles
d) 130 moles
Answer: c
81. What is the primary goal of using photocatalysis in green chemistry?
a) To increase energy consumption
b) To utilize light as a clean energy source for chemical reactions
c) To maximize waste production
d) To increase the use of toxic catalysts
Answer: b
82. Which of the following is NOT a common method for reducing the environmental impact of
chemical processes?
a) Use of renewable feedstocks
b) Maximizing solvent use
c) Process intensification
d) Catalytic reactions
Answer: b
83. What is the main advantage of using supercritical fluids in green chemistry?
a) They are highly toxic
b) They can replace organic solvents and are easily removed
c) They increase energy consumption
d) They decrease reaction selectivity
Answer: b
84. Which of the following is an example of a green reducing agent?
a) Lithium aluminum hydride
b) Sodium cyanoborohydride
c) Zinc dust
d) Tin(II) chloride
Answer: c
85. What is the primary goal of using membrane technology in green chemistry?
a) To increase solvent use
b) To enable efficient separations with reduced energy consumption
c) To maximize waste production
d) To decrease product purity
Answer: b
86. Which of the following is NOT a typical characteristic of a green catalyst?
a) High activity
b) Low selectivity
c) Recyclability
d) Derived from abundant materials
Answer: b
87. What is the main advantage of using ball milling in green chemistry?
a) It increases solvent use
b) It enables solvent-free or low-solvent mechanochemical reactions
c) It decreases reaction rates
d) It increases energy consumption
Answer: b
88. Which of the following is an example of a bio-based solvent?
a) Dichloromethane
b) 2-Methyltetrahydrofuran
c) Hexane
d) Diethyl ether
Answer: b
89. What is the primary goal of using process analytical technology (PAT) in green chemistry?
a) To increase waste production
b) To enable real-time monitoring and control of processes for improved efficiency
c) To maximize energy consumption
d) To decrease product quality
Answer: b
90. Which of the following is NOT a common method for improving atom economy in chemical
processes?
a) Use of catalysts
b) Stoichiometric reactions
c) Avoiding protection/deprotection steps
d) Maximizing the use of auxiliary substances
Answer: d
91. If a process has an E-factor of 3 and produces 40 kg of product, how much waste is
generated?
a) 80 kg
b) 100 kg
c) 120 kg
d) 140 kg
Answer: c
92. A reaction has an atom economy of 85%. If 150 grams of reactants are used, what is the
maximum possible mass of product?
a) 117.5 grams
b) 127.5 grams
c) 137.5 grams
d) 147.5 grams
Answer: b
93. If a process has a mass intensity (MI) of 30 and uses 600 kg of materials, how much product
is formed?
a) 15 kg
b) 20 kg
c) 25 kg
d) 30 kg
Answer: b
94. A reaction has a carbon efficiency of 70%. If the product contains 70 carbon atoms, how
many carbon atoms were present in the reactants?
a) 80
b) 90
c) 100
d) 110
Answer: c
A reaction has a carbon efficiency of 75%. If the product contains 60 carbon atoms, how many
carbon atoms were present in the reactants?
a) 60
b) 70
c) 80
d) 90
Answer: c
55. If a process uses 3 kg of solvent to produce 2 kg of product, what is the solvent intensity?
a) 0.67
b) 1.5
c) 2
d) 3
Answer: b
56. A reaction has an E-factor of 3 and produces 40 kg of waste. How much product is formed?
a) 10 kg
b) 13.33 kg
c) 15 kg
d) 20 kg
Answer: b
57. If a process has a reaction mass efficiency (RME) of 70% and uses 200 grams of reactants,
how many grams of product are formed?
a) 120 grams
b) 130 grams
c) 140 grams
d) 150 grams
Answer: c
58. A reaction has an atom economy of 85% and a yield of 75%. What is the atom utilization?
a) 53.75%
b) 63.75%
c) 73.75%
d) 83.75%
Answer: b
59. If a process uses 0.5 kg of catalyst to produce 50 kg of product, what is the catalyst
intensity?
a) 0.01
b) 0.02
c) 0.05
d) 0.1
Answer: a
60. A reaction has a carbon efficiency of 60%. If the reactants contain 200 moles of carbon, how
many moles of carbon are incorporated into the product?
a) 100 moles
b) 120 moles
c) 140 moles
d) 160 moles
Answer: b
61. What is the primary goal of using renewable feedstocks in green chemistry?
a) To increase production costs
b) To reduce dependence on fossil resources
c) To decrease product quality
d) To increase waste generation
Answer: b
62. Which of the following is NOT a typical characteristic of a green solvent?
a) Low toxicity
b) High volatility
c) Biodegradability
d) Derived from renewable resources
Answer: b
63. What is the main advantage of using microreactors in green chemistry?
a) They increase energy consumption
b) They allow for better heat and mass transfer
c) They maximize solvent use
d) They decrease reaction selectivity
Answer: b
64. Which of the following is an example of a green oxidizing agent?
a) Chromium trioxide
b) Oxygen
c) Potassium permanganate
d) Lead tetraacetate
Answer: b
65. What is the main advantage of using phase transfer catalysis in green chemistry?
a) It increases solvent use
b) It allows reactions between immiscible reactants without organic solvents
c) It decreases reaction rates
d) It increases waste production
Answer: b
66. Which of the following is NOT a common method for improving energy efficiency in chemical
processes?
a) Process intensification
b) Heat integration
c) Use of microwaves
d) Increasing reaction temperature
Answer: d
67. What is the primary goal of using biocatalysts in green chemistry?
a) To increase the use of organic solvents
b) To utilize enzymes for selective and efficient transformations
c) To maximize waste production
d) To increase energy consumption
Answer: b
68. Which of the following is an example of a green chelating agent?
a) EDTA
b) Gluconic acid
c) Nitrilotriacetic acid
d) Diethylenetriaminepentaacetic acid
Answer: b
69. What is the main advantage of using ultrasound in green chemistry?
a) It increases energy consumption
b) It can enhance reaction rates and reduce the need for harsh conditions
c) It maximizes solvent use
d) It decreases reaction selectivity
Answer: b
70. Which of the following is NOT a typical characteristic of a green chemical product?
a) Biodegradability
b) Low toxicity
c) High bioaccumulation potential
d) Derived from renewable resources
Answer: c
71. If a process has an E-factor of 5 and generates 150 kg of waste, how much product is
formed?
a) 20 kg
b) 25 kg
c) 30 kg
d) 35 kg
Answer: c
72. A reaction has an atom economy of 70%. If 200 grams of reactants are used, what is the
maximum possible mass of product?
a) 120 grams
b) 130 grams
c) 140 grams
d) 150 grams
Answer: c
73. If a process has a mass intensity (MI) of 25 and produces 20 kg of product, what is the total
mass of materials used?
a) 400 kg
b) 450 kg
c) 500 kg
d) 550 kg
Answer: c
74. A reaction has a carbon efficiency of 80%. If the product contains 80 carbon atoms, how
many carbon atoms were present in the reactants?
a) 80
b) 90
c) 100
d) 110
Answer: c
75. If a process uses 4 kg of solvent to produce 2 kg of product, what is the solvent intensity?
a) 1
b) 2
c) 3
d) 4
Answer: b
76. A reaction has an E-factor of 2 and produces 30 kg of product. How much waste is
generated?
a) 45 kg
b) 60 kg
c) 75 kg
d) 90 kg
Answer: b
77. If a process has a reaction mass efficiency (RME) of 65% and produces 130 grams of
product, how many grams of reactants were used?
a) 180 grams
b) 190 grams
c) 200 grams
d) 210 grams
Answer: c
78. A reaction has an atom economy of 90% and a yield of 70%. What is the atom utilization?
a) 53%
b) 63%
c) 73%
d) 83%
Answer: b
79. If a process uses 0.2 kg of catalyst to produce 40 kg of product, what is the catalyst
intensity?
a) 0.005
b) 0.01
c) 0.015
d) 0.02
Answer: a
80. A reaction has a carbon efficiency of 75%. If the reactants contain 160 moles of carbon, how
many moles of carbon are incorporated into the product?
a) 100 moles
b) 110 moles
c) 120 moles
d) 130 moles
Answer: c
81. What is the primary goal of using photocatalysis in green chemistry?
a) To increase energy consumption
b) To utilize light as a clean energy source for chemical reactions
c) To maximize waste production
d) To increase the use of toxic catalysts
Answer: b
82. Which of the following is NOT a common method for reducing the environmental impact of
chemical processes?
a) Use of renewable feedstocks
b) Maximizing solvent use
c) Process intensification
d) Catalytic reactions
Answer: b
83. What is the main advantage of using supercritical fluids in green chemistry?
a) They are highly toxic
b) They can replace organic solvents and are easily removed
c) They increase energy consumption
d) They decrease reaction selectivity
Answer: b
84. Which of the following is an example of a green reducing agent?
a) Lithium aluminum hydride
b) Sodium cyanoborohydride
c) Zinc dust
d) Tin(II) chloride
Answer: c
85. What is the primary goal of using membrane technology in green chemistry?
a) To increase solvent use
b) To enable efficient separations with reduced energy consumption
c) To maximize waste production
d) To decrease product purity
Answer: b
86. Which of the following is NOT a typical characteristic of a green catalyst?
a) High activity
b) Low selectivity
c) Recyclability
d) Derived from abundant materials
Answer: b
87. What is the main advantage of using ball milling in green chemistry?
a) It increases solvent use
b) It enables solvent-free or low-solvent mechanochemical reactions
c) It decreases reaction rates
d) It increases energy consumption
Answer: b
88. Which of the following is an example of a bio-based solvent?
a) Dichloromethane
b) 2-Methyltetrahydrofuran
c) Hexane
d) Diethyl ether
Answer: b
89. What is the primary goal of using process analytical technology (PAT) in green chemistry?
a) To increase waste production
b) To enable real-time monitoring and control of processes for improved efficiency
c) To maximize energy consumption
d) To decrease product quality
Answer: b
90. Which of the following is NOT a common method for improving atom economy in chemical
processes?
a) Use of catalysts
b) Stoichiometric reactions
c) Avoiding protection/deprotection steps
d) Maximizing the use of auxiliary substances
Answer: d
91. If a process has an E-factor of 3 and produces 40 kg of product, how much waste is
generated?
a) 80 kg
b) 100 kg
c) 120 kg
d) 140 kg
Answer: c
92. A reaction has an atom economy of 85%. If 150 grams of reactants are used, what is the
maximum possible mass of product?
a) 117.5 grams
b) 127.5 grams
c) 137.5 grams
d) 147.5 grams
Answer: b
93. If a process has a mass intensity (MI) of 30 and uses 600 kg of materials, how much product
is formed?
a) 15 kg
b) 20 kg
c) 25 kg
d) 30 kg
Answer: b
94. A reaction has a carbon efficiency of 70%. If the product contains 70 carbon atoms, how
many carbon atoms were present in the reactants?
a) 80
b) 90
c) 100
d) 110
Answer: c
A reaction has a carbon efficiency of 75%. If the product contains 60 carbon atoms, how many
carbon atoms were present in the reactants?
a) 60
b) 70
c) 80
d) 90
Answer: c
55. If a process uses 3 kg of solvent to produce 2 kg of product, what is the solvent intensity?
a) 0.67
b) 1.5
c) 2
d) 3
Answer: b
56. A reaction has an E-factor of 3 and produces 40 kg of waste. How much product is formed?
a) 10 kg
b) 13.33 kg
c) 15 kg
d) 20 kg
Answer: b
57. If a process has a reaction mass efficiency (RME) of 70% and uses 200 grams of reactants,
how many grams of product are formed?
a) 120 grams
b) 130 grams
c) 140 grams
d) 150 grams
Answer: c
58. A reaction has an atom economy of 85% and a yield of 75%. What is the atom utilization?
a) 53.75%
b) 63.75%
c) 73.75%
d) 83.75%
Answer: b
59. If a process uses 0.5 kg of catalyst to produce 50 kg of product, what is the catalyst
intensity?
a) 0.01
b) 0.02
c) 0.05
d) 0.1
Answer: a
60. A reaction has a carbon efficiency of 60%. If the reactants contain 200 moles of carbon, how
many moles of carbon are incorporated into the product?
a) 100 moles
b) 120 moles
c) 140 moles
d) 160 moles
Answer: b
61. What is the primary goal of using renewable feedstocks in green chemistry?
a) To increase production costs
b) To reduce dependence on fossil resources
c) To decrease product quality
d) To increase waste generation
Answer: b
62. Which of the following is NOT a typical characteristic of a green solvent?
a) Low toxicity
b) High volatility
c) Biodegradability
d) Derived from renewable resources
Answer: b
63. What is the main advantage of using microreactors in green chemistry?
a) They increase energy consumption
b) They allow for better heat and mass transfer
c) They maximize solvent use
d) They decrease reaction selectivity
Answer: b
64. Which of the following is an example of a green oxidizing agent?
a) Chromium trioxide
b) Oxygen
c) Potassium permanganate
d) Lead tetraacetate
Answer: b
65. What is the main advantage of using phase transfer catalysis in green chemistry?
a) It increases solvent use
b) It allows reactions between immiscible reactants without organic solvents
c) It decreases reaction rates
d) It increases waste production
Answer: b
66. Which of the following is NOT a common method for improving energy efficiency in chemical
processes?
a) Process intensification
b) Heat integration
c) Use of microwaves
d) Increasing reaction temperature
Answer: d
67. What is the primary goal of using biocatalysts in green chemistry?
a) To increase the use of organic solvents
b) To utilize enzymes for selective and efficient transformations
c) To maximize waste production
d) To increase energy consumption
Answer: b
68. Which of the following is an example of a green chelating agent?
a) EDTA
b) Gluconic acid
c) Nitrilotriacetic acid
d) Diethylenetriaminepentaacetic acid
Answer: b
69. What is the main advantage of using ultrasound in green chemistry?
a) It increases energy consumption
b) It can enhance reaction rates and reduce the need for harsh conditions
c) It maximizes solvent use
d) It decreases reaction selectivity
Answer: b
70. Which of the following is NOT a typical characteristic of a green chemical product?
a) Biodegradability
b) Low toxicity
c) High bioaccumulation potential
d) Derived from renewable resources
Answer: c
71. If a process has an E-factor of 5 and generates 150 kg of waste, how much product is
formed?
a) 20 kg
b) 25 kg
c) 30 kg
d) 35 kg
Answer: c
72. A reaction has an atom economy of 70%. If 200 grams of reactants are used, what is the
maximum possible mass of product?
a) 120 grams
b) 130 grams
c) 140 grams
d) 150 grams
Answer: c
73. If a process has a mass intensity (MI) of 25 and produces 20 kg of product, what is the total
mass of materials used?
a) 400 kg
b) 450 kg
c) 500 kg
d) 550 kg
Answer: c
74. A reaction has a carbon efficiency of 80%. If the product contains 80 carbon atoms, how
many carbon atoms were present in the reactants?
a) 80
b) 90
c) 100
d) 110
Answer: c
75. If a process uses 4 kg of solvent to produce 2 kg of product, what is the solvent intensity?
a) 1
b) 2
c) 3
d) 4
Answer: b
76. A reaction has an E-factor of 2 and produces 30 kg of product. How much waste is
generated?
a) 45 kg
b) 60 kg
c) 75 kg
d) 90 kg
Answer: b
77. If a process has a reaction mass efficiency (RME) of 65% and produces 130 grams of
product, how many grams of reactants were used?
a) 180 grams
b) 190 grams
c) 200 grams
d) 210 grams
Answer: c
78. A reaction has an atom economy of 90% and a yield of 70%. What is the atom utilization?
a) 53%
b) 63%
c) 73%
d) 83%
Answer: b
79. If a process uses 0.2 kg of catalyst to produce 40 kg of product, what is the catalyst
intensity?
a) 0.005
b) 0.01
c) 0.015
d) 0.02
Answer: a
80. A reaction has a carbon efficiency of 75%. If the reactants contain 160 moles of carbon, how
many moles of carbon are incorporated into the product?
a) 100 moles
b) 110 moles
c) 120 moles
d) 130 moles
Answer: c
81. What is the primary goal of using photocatalysis in green chemistry?
a) To increase energy consumption
b) To utilize light as a clean energy source for chemical reactions
c) To maximize waste production
d) To increase the use of toxic catalysts
Answer: b
82. Which of the following is NOT a common method for reducing the environmental impact of
chemical processes?
a) Use of renewable feedstocks
b) Maximizing solvent use
c) Process intensification
d) Catalytic reactions
Answer: b
83. What is the main advantage of using supercritical fluids in green chemistry?
a) They are highly toxic
b) They can replace organic solvents and are easily removed
c) They increase energy consumption
d) They decrease reaction selectivity
Answer: b
84. Which of the following is an example of a green reducing agent?
a) Lithium aluminum hydride
b) Sodium cyanoborohydride
c) Zinc dust
d) Tin(II) chloride
Answer: c
85. What is the primary goal of using membrane technology in green chemistry?
a) To increase solvent use
b) To enable efficient separations with reduced energy consumption
c) To maximize waste production
d) To decrease product purity
Answer: b
86. Which of the following is NOT a typical characteristic of a green catalyst?
a) High activity
b) Low selectivity
c) Recyclability
d) Derived from abundant materials
Answer: b
87. What is the main advantage of using ball milling in green chemistry?
a) It increases solvent use
b) It enables solvent-free or low-solvent mechanochemical reactions
c) It decreases reaction rates
d) It increases energy consumption
Answer: b
88. Which of the following is an example of a bio-based solvent?
a) Dichloromethane
b) 2-Methyltetrahydrofuran
c) Hexane
d) Diethyl ether
Answer: b
89. What is the primary goal of using process analytical technology (PAT) in green chemistry?
a) To increase waste production
b) To enable real-time monitoring and control of processes for improved efficiency
c) To maximize energy consumption
d) To decrease product quality
Answer: b
90. Which of the following is NOT a common method for improving atom economy in chemical
processes?
a) Use of catalysts
b) Stoichiometric reactions
c) Avoiding protection/deprotection steps
d) Maximizing the use of auxiliary substances
Answer: d
91. If a process has an E-factor of 3 and produces 40 kg of product, how much waste is
generated?
a) 80 kg
b) 100 kg
c) 120 kg
d) 140 kg
Answer: c
92. A reaction has an atom economy of 85%. If 150 grams of reactants are used, what is the
maximum possible mass of product?
a) 117.5 grams
b) 127.5 grams
c) 137.5 grams
d) 147.5 grams
Answer: b
93. If a process has a mass intensity (MI) of 30 and uses 600 kg of materials, how much product
is formed?
a) 15 kg
b) 20 kg
c) 25 kg
d) 30 kg
Answer: b
94. A reaction has a carbon efficiency of 70%. If the product contains 70 carbon atoms, how
many carbon atoms were present in the reactants?
a) 80
b) 90
c) 100
d) 110
Answer: c
82. Which of the following is NOT a common method for reducing the environmental impact of
chemical processes?
a) Use of renewable feedstocks
b) Maximizing solvent use
c) Process intensification
d) Catalytic reactions
Answer: b
83. What is the main advantage of using supercritical fluids in green chemistry?
a) They are highly toxic
b) They can replace organic solvents and are easily removed
c) They increase energy consumption
d) They decrease reaction selectivity
Answer: b
84. Which of the following is an example of a green reducing agent?
a) Lithium aluminum hydride
b) Sodium cyanoborohydride
c) Zinc dust
d) Tin(II) chloride
Answer: c
85. What is the primary goal of using membrane technology in green chemistry?
a) To increase solvent use
b) To enable efficient separations with reduced energy consumption
c) To maximize waste production
d) To decrease product purity
Answer: b
86. Which of the following is NOT a typical characteristic of a green catalyst?
a) High activity
b) Low selectivity
c) Recyclability
d) Derived from abundant materials
Answer: b
87. What is the main advantage of using ball milling in green chemistry?
a) It increases solvent use
b) It enables solvent-free or low-solvent mechanochemical reactions
c) It decreases reaction rates
d) It increases energy consumption
Answer: b
88. Which of the following is an example of a bio-based solvent?
a) Dichloromethane
b) 2-Methyltetrahydrofuran
c) Hexane
d) Diethyl ether
Answer: b
89. What is the primary goal of using process analytical technology (PAT) in green chemistry?
a) To increase waste production
b) To enable real-time monitoring and control of processes for improved efficiency
c) To maximize energy consumption
d) To decrease product quality
Answer: b
90. Which of the following is NOT a common method for improving atom economy in chemical
processes?
a) Use of catalysts
b) Stoichiometric reactions
c) Avoiding protection/deprotection steps
d) Maximizing the use of auxiliary substances
Answer: d
91. If a process has an E-factor of 3 and produces 40 kg of product, how much waste is
generated?
a) 80 kg
b) 100 kg
c) 120 kg
d) 140 kg
Answer: c
92. A reaction has an atom economy of 85%. If 150 grams of reactants are used, what is the
maximum possible mass of product?
a) 117.5 grams
b) 127.5 grams
c) 137.5 grams
d) 147.5 grams
Answer: b
93. If a process has a mass intensity (MI) of 30 and uses 600 kg of materials, how much product
is formed?
a) 15 kg
b) 20 kg
c) 25 kg
d) 30 kg
Answer: b
94. A reaction has a carbon efficiency of 70%. If the product contains 70 carbon atoms, how
many carbon atoms were present in the reactants?
a) 80
b) 90
c) 100
d) 110
Answer: c
95. If a process uses 2.5 kg of solvent to produce 1 kg of product, what is the solvent intensity?
a) 1.5
b) 2
c) 2.5
d) 3
Answer: c
96. A reaction has an E-factor of 4 and generates 200 kg of waste. How much product is
formed?
a) 40 kg
b) 50 kg
c) 60 kg
d) 70 kg
Answer: b
97. If a process has a reaction mass efficiency (RME) of 75% and uses 240 grams of reactants,
how many grams of product are formed?
a) 160 grams
b) 170 grams
c) 180 grams
d) 190 grams
Answer: c
98. A reaction has an atom economy of 95% and a yield of 85%. What is the atom utilization?
a) 70.75%
b) 75.75%
c) 80.75%
d) 85.75%
Answer: c
99. If a process uses 0.3 kg of catalyst to produce 60 kg of product, what is the catalyst
intensity?
a) 0.003
b) 0.005
c) 0.007
d) 0.009
Answer: b
100. A reaction has a carbon efficiency of 80%. If the reactants contain 250 moles of carbon,
how many moles of carbon are incorporated into the product?
a) 180 moles
b) 190 moles
c) 200 moles
d) 210 moles
Answer: c
