Tag: chemistry

Questions Related to chemistry

Whenever practicable, synthetic methods should be designed to use and generate substances that are little or not toxic to human health and environment, is an objective of:

chemistry environmental chemistry biochemistry and the environment green chemistry strategies to control environmental pollution and green chemistry

  1. waste management

  2. green chemistry

  3. air pollution

  4. green revolution

Show answer
Correct Option: B
Explanation:

Green chemistry also called sustainable chemistry, is an area of chemistry and chemical engineering, focused on the designing of products and processes that minimize the use of generation of hazardous substances.

Current commercial method for producing ibuprofen is a stunning application of Green chemistry because ______ .

chemistry environmental chemistry biochemistry and the environment green chemistry strategies to control environmental pollution and green chemistry

  1. ibuprofen is an anti-inflammatory drug and has various applications

  2. the previous method required large amounts of solvents and generated large wastes compared to the current method

  3. it has very important medicinal value

  4. this compound has very less side effects after usage

Show answer
Correct Option: B
Explanation:

The current commercial method for producing ibuprofen is a stunning application of green chemistry. Conventional methods of ibuprofen production requires six steps, hence, used large amounts of solvents and generated large amount of wastes. Current methods of ibuprofen production has just three steps and minimal waste, and is an application of Green chemistry.

To manufacture computer chips, many chemicals, large amounts of water, and energy are required which is harmful to environment. a process is discovered which significantly reduces the quantities of chemicals, energy, and water needed to produce chips. This is an application of:

chemistry environmental chemistry biochemistry and the environment green chemistry strategies to control environmental pollution and green chemistry

  1. Green chemistry

  2. waste management

  3. revolution resource recovery

  4. Green revolution

Show answer
Correct Option: A
Explanation:
Green chemistry seeks to develop products and processes that are kind to the environment. This can involve reducing the waste a process creates, using renewable materials, lessening the energy required to form a product, etc.

A raw material feedstock should be renewable rather than depleting, whenever technically and ecomonically practical, is an objective of:

chemistry environmental chemistry biochemistry and the environment green chemistry strategies to control environmental pollution and green chemistry

  1. Green revolution

  2. Green chemistry

  3. waste management

  4. revolution resource recovery

Show answer
Correct Option: B
Explanation:

Green chemistry seeks to develop products and processes that are kind to the environment. This can involve reducing the waste a process creates, using renewable materials, lessening the energy required to form a product, etc.
The given process is promoting renewable use of raw materials, hence, it is an objective of Green chemistry.

Plastics being developed from eco-friendly renewable sources, plus some modern plastics are biodegradable is one of the achievements of________.

chemistry environmental chemistry biochemistry and the environment green chemistry strategies to control environmental pollution and green chemistry

  1. Green revolution

  2. Waste management

  3. Revolution resource recovery

  4. Green chemistry

Show answer
Correct Option: D
Explanation:

Green chemistry seeks to develop products and processes that are kind to the environment.
Plastics being developed from eco-friendly renewable sources, plus some modern plastics are biodegradable. The combination of innovations reduces our dependence on petroleum products, protects humans and wildlife from undesirable chemicals in old plastics, and reduces waste and impact on the environment.

Which of the following is not an objective of Green chemistry?

chemistry environmental chemistry biochemistry and the environment green chemistry strategies to control environmental pollution and green chemistry

  1. It is better to prevent waste than to treat or clean up waste after it has been created.

  2. The use of auxiliary substances (e.g., solvents, separation agents, etc.) should be made unnecessary wherever possible and innocuous when used.

  3. Energy requirements of chemical processes should be recognized for their environmental and economic impacts and should be minimized. If possible, synthetic methods should be conducted at ambient temperature and pressure.

  4. None of the above

Show answer
Correct Option: D
Explanation:

All the three are objectives of Green chemistry.
1. Waste Prevention:   
It is better to prevent waste than to treat or clean up waste after it has been created.
2. Safer Solvents and Auxiliaries:    
The use of auxiliary substances (e.g., solvents, separation agents, etc.) should be made unnecessary wherever possible and innocuous when used.
3. Design for Energy Efficiency:    
Energy requirements of chemical processes should be recognized for their environmental and economic impacts and should be minimized. If possible, synthetic methods should be conducted at ambient temperature and pressure.

Biomass is used instead of extensive use of petroleum. This is an application of :

chemistry environmental chemistry biochemistry and the environment green chemistry strategies to control environmental pollution and green chemistry

  1. Green revolution

  2. waste management

  3. Green chemistry

  4. revolution resource recovery

Show answer
Correct Option: C
Explanation:

Use of petroleum creates lots of gases which are harmful to the environment. 


In order to decrease human consumption of petroleum, chemists have investigated methods for producing polymers from renewable resources such as biomass. 

NatureWorks polylactic acid (PLA) is a polymer of naturally occurring lactic acid (LA), which on consumption creates no waste and hence, is an environment-friendly compound.

It is an application of Green chemistry.

Hence the correct option is C.

_______ is an environment-friendly product and better than halons which are used to extinguish fire.

chemistry environmental chemistry biochemistry and the environment green chemistry strategies to control environmental pollution and green chemistry

  1. Ibuprofen

  2. Pyrocool

  3. Carcinogen

  4. Carbon-dioxide

Show answer
Correct Option: B
Explanation:

Pyrocool is a product which is environmentally benign foam discovered using concept of Green chemistry. Large-scale fires such as oil tankers and jet airplane can be extinguished in a short time and in a better way than previous use of the halons.

Taking chromium and arsenic, which are toxic, out of pressure-treated wood, and using new less toxic chemicals for bleaching paper, are examples of _________.

chemistry environmental chemistry biochemistry and the environment green chemistry strategies to control environmental pollution and green chemistry

  1. Green chemistry

  2. Green revolution

  3. revolution resource recovery

  4. waste management

Show answer
Correct Option: A
Explanation:

Green chemistry seeks to develop products and processes that are kind to the environment. This can involve reducing the waste a process creates, using renewable materials, lessening the energy required to form a product, etc.
Both the processes in the question involves forming products which are more friendly towards the environment. Hence, they are the applications of Green chemistry.

Plastic used to preserve yogurts is replaced with a polymer called polylactic acid is an example of _______.

chemistry environmental chemistry biochemistry and the environment green chemistry strategies to control environmental pollution and green chemistry

  1. green chemistry

  2. waste management

  3. green revolution

  4. none of above

Show answer
Correct Option: A
Explanation:

Since usage of petroleum-based plastic is harmful to the environment, a polymer called polylactic acid, made using micro-organisms to convert cornstarch into a resin, is used to preserve yogurt. The resulting polymer is used to replace rigid petroleum-based plastic used in yogurt containers and water bottles and is environment-friendly. It is an application of green chemistry