Question

By green chemistry, we mean
1. Producing chemicals of our daily use from greenhouse gases
2. Performing chemical processes which green plants
3. Performing only those reactions which are of biological origin
4. The use of non-toxic reagents and solvents to produce environmentally-friendly products

Answer 1

Correct Answer - Option 4 : The use of non-toxic reagents and solvents to produce environmentally-friendly products

The correct answer is The use of non-toxic reagents and solvents to produce environmentally-friendly products.

• Green chemistry is also called sustainable chemistry.
• It is a design of chemical products and processes that reduce or eliminate the use of substances (or generation of substances) that are hazardous to humans, animals, plants, and the environment.
• The use of non-toxic reagents and solvents to produce environmentally-friendly products.

• Green chemistry principles cover concepts such as,
  • Design of processes to maximize the amount of raw material use that ends up in the final product.
  • Use of renewable material feedstocks and energy sources.
  • Use of safe, environmentally benign substances, including solvents, whenever possible.
  • Energy-efficient processes.
  • Avoiding the production of waste, which is viewed as the ideal form of waste management.

• Example
  • Green solvents
    • The major application of solvents in human activities is in paints and coatings (46% of usage).
    • Smaller volume applications include cleaning, de-greasing, adhesives, and chemical synthesis