Question 1

The third principle of green chemistry focuses on hazardous chemicals. This means that:

Accepted Answer

A)  We should design less hazardous products 
B)  We should avoid hazardous chemicals in any part of the process and in final products. 
C)  We should use less hazardous feedstock. 
A)  We should design less hazardous products 
B)  We should avoid hazardous chemicals in any part of the process and in final products. 
C)  We should use less hazardous feedstock. B

Question 2

Which of the following statements describes the idea of prevention principle the best?

Accepted Answer

A)  Deal with the waste as soon as possible. 
B)  Better to avoid the production of any waste than deal with it at any point. 
C)  Convert the waste into a raw material. 
A)  Deal with the waste as soon as possible. 
B)  Better to avoid the production of any waste than deal with it at any point. 
C)  Convert the waste into a raw material. B

Question 3

Is there a difference between "a risk" and "a hazard"?

Accepted Answer

A)  There is no difference, the two words are synonyms. 
B)  Yes: something is "hazardous" if it has a potential to harm, "a risk" is a likelihood of a hazard doing harm. 
C)  Yes: something is "risky" if it has a potential to harm, "a hazard" is a likelihood of harm happening. 
A)  There is no difference, the two words are synonyms. 
B)  Yes: something is "hazardous" if it has a potential to harm, "a risk" is a likelihood of a hazard doing harm. 
C)  Yes: something is "risky" if it has a potential to harm, "a hazard" is a likelihood of harm happening. B

Question 4

Based on green chemistry principles, what are some of the major issues with use of organic solvents in industry?
(i) They are generally flammable and thus present a hazard.
(ii) They are generally extracted from oil, a non-renewable source.
(iii) They are not easy to distill and hence reuse.

Accepted Answer

A)  (i) and (ii) 
B)  (i) and (iii) 
C)  (ii) and (iii) 
A)  (i) and (ii) 
B)  (i) and (iii) 
C)  (ii) and (iii)

Question 5

Besides being of pure scientific interest, what is important about photochemical reactions from the point of view of green chemistry?

Accepted Answer

A)  Photochemical reactions use renewable energy for the reaction. 
B)  Photochemical reactions do not require a catalyst. 
C)  Generally, photochemical reactions have a better yield. 
A)  Photochemical reactions use renewable energy for the reaction. 
B)  Photochemical reactions do not require a catalyst. 
C)  Generally, photochemical reactions have a better yield.

Question 6

You have a reaction that yields 65% of the product and has a 70% atom economy. What can you suggest?

Accepted Answer

A)  Nothing to suggest: good yield and atom economy. 
B)  Focus on finding a process that could increase the yield. 
C)  Try to find a new reaction that would have higher yield and at least the same (if not better) atom economy. 
A)  Nothing to suggest: good yield and atom economy. 
B)  Focus on finding a process that could increase the yield. 
C)  Try to find a new reaction that would have higher yield and at least the same (if not better) atom economy.

Question 7

If you want to design a more energy efficient process, which factor(s) would you pay special attention to?
(i) reaction temperature
(ii) reaction pressure
(iii) reactant flow

Accepted Answer

A)  (i) and (ii) 
B)  (i) only 
C)  (i) and (iii) 
A)  (i) and (ii) 
B)  (i) only 
C)  (i) and (iii)

Question 8

Which of the following is an example of the product that should be replaced with a safer one?

Accepted Answer

A)  Hydrofluorocarbons 
B)  Chlorofluorocarbons 
C)  DDT 
A)  Hydrofluorocarbons 
B)  Chlorofluorocarbons 
C)  DDT

Question 9

What are ionic liquids?

Accepted Answer

A)  Molten ionic compounds such as NaCl 
B)  Solutions containing high concentration of ions. 
C)  Ionic compounds that are liquid at ambient conditions due to very low lattice energies. 
A)  Molten ionic compounds such as NaCl 
B)  Solutions containing high concentration of ions. 
C)  Ionic compounds that are liquid at ambient conditions due to very low lattice energies.

Question 10

Many products in use today are based on organic polymers (such as PVC, for example) that require oil for raw materials. Why would you consider changing organic plastic products and what might be alternatives?

Accepted Answer

A)  Organic plastic products do not have good physical properties; possible alternative are P-N polymers. 
B)  Oil is a non-renewable source and plastic is not easily degradable. Some plastic materials could be replaced with silicone polymers because they are not hazardous. 
C)  We should use oil for energy. Possible replacement are B-N polymers because B-N bond is isoelectronic with C-C bond and many organic compounds already have well-established B-N analogues. 
A)  Organic plastic products do not have good physical properties; possible alternative are P-N polymers. 
B)  Oil is a non-renewable source and plastic is not easily degradable. Some plastic materials could be replaced with silicone polymers because they are not hazardous. 
C)  We should use oil for energy. Possible replacement are B-N polymers because B-N bond is isoelectronic with C-C bond and many organic compounds already have well-established B-N analogues.

The third principle of green chemistry focuses on hazardous chemicals. This means that:

Which of the following statements describes the idea of prevention principle the best?

Is there a difference between "a risk" and "a hazard"?

Based on green chemistry principles, what are some of the major issues with use of organic solvents in industry? (i) They are generally flammable and thus present a hazard. (ii) They are generally extracted from oil, a non-renewable source. (iii) They are not easy to distill and hence reuse.

Besides being of pure scientific interest, what is important about photochemical reactions from the point of view of green chemistry?

You have a reaction that yields 65% of the product and has a 70% atom economy. What can you suggest?

If you want to design a more energy efficient process, which factor(s) would you pay special attention to? (i) reaction temperature (ii) reaction pressure (iii) reactant flow

Which of the following is an example of the product that should be replaced with a safer one?

What are ionic liquids?

Many products in use today are based on organic polymers (such as PVC, for example) that require oil for raw materials. Why would you consider changing organic plastic products and what might be alternatives?

Atomic Structure

Molecular Structure and Bonding

Molecular Symmetry

The Structures of Simple Solids

Acids and Bases

Oxidation and Reduction

An Introduction to Coordination Compounds

Physical Techniques in Inorganic Chemistry

Periodic Trends

Hydrogen

The Group 1 Elements

The Group 2 Elements

The Group 13 Elements

The Group 14 Elements

The Group 15 Elements

The Group 16 Elements

The Group 17 Elements

The Group 18 Elements

The D-Block Elements

The D-Metal Complexes: Electronic Structure and Spectra

Coordination Chemistry: Reactions of Complexes

D-Metal Organometallic Chemistry

The F-Block Metals

Materials Chemistry and Nanomaterials

Biological Inorganic Chemistry

Inorganic Chemistry in Medicine

Filters

Exam 25: Green Chemistry

The third principle of green chemistry focuses on hazardous chemicals. This means that:

Which of the following statements describes the idea of prevention principle the best?

Is there a difference between "a risk" and "a hazard"?

Based on green chemistry principles, what are some of the major issues with use of organic solvents in industry? (i) They are generally flammable and thus present a hazard. (ii) They are generally extracted from oil, a non-renewable source. (iii) They are not easy to distill and hence reuse.

Besides being of pure scientific interest, what is important about photochemical reactions from the point of view of green chemistry?

You have a reaction that yields 65% of the product and has a 70% atom economy. What can you suggest?

If you want to design a more energy efficient process, which factor(s) would you pay special attention to? (i) reaction temperature (ii) reaction pressure (iii) reactant flow

Which of the following is an example of the product that should be replaced with a safer one?

What are ionic liquids?

Many products in use today are based on organic polymers (such as PVC, for example) that require oil for raw materials. Why would you consider changing organic plastic products and what might be alternatives?

Atomic Structure

Molecular Structure and Bonding

Molecular Symmetry

The Structures of Simple Solids

Acids and Bases

Oxidation and Reduction

An Introduction to Coordination Compounds

Physical Techniques in Inorganic Chemistry

Periodic Trends

Hydrogen

The Group 1 Elements

The Group 2 Elements

The Group 13 Elements

The Group 14 Elements

The Group 15 Elements

The Group 16 Elements

The Group 17 Elements

The Group 18 Elements

The D-Block Elements

The D-Metal Complexes: Electronic Structure and Spectra

Coordination Chemistry: Reactions of Complexes

D-Metal Organometallic Chemistry

The F-Block Metals

Materials Chemistry and Nanomaterials

Biological Inorganic Chemistry

Inorganic Chemistry in Medicine

Filters