Green Synthesis MCQs

1. Find out the percentage of atom economy for the reaction C₂H₄ + ½ O₂ → C₂H₄O (Ethylene oxide). This reaction takes place in the presence of a catalyst.

(A) 100%

(B) 25%

(C) 75%

(D) 50%

2. ____ is also known as self thermoregulated systems.

(A) Green concepts

(B) Green synthesis

(C) Green methodologies

(D) Green principles

3. Which of the following is the correct formula for the percentage of atom utilization?

(A) (mole weight of desired product * 100) / [mole wt of (total product + desired product)]

(B) (mole weight of desired product * 100) / mole wt of (desired product + used product)

(C) (mole weight of desired product * 100) / mole wt of (by product + desired product)

(D) (mole weight of desired product * 100) / mole wt of (desired product)

4. Which of the following reactions involves reorganization of the atoms of the molecules?

(A) Addition reactions

(B) Rearrangement reactions

(C) Reorganised reactions

(D) Elimination reactions

5. Which product is obtained first in the petrochemical industry, both in conventional and green synthesis methods?

(A) 2-methyl propyl benzene

(B) 2-ethyl benzene

(C) Methyl methacrylate

(D) Ethanol

6. A fundamental advantage of sonochemistry in organic synthesis without solvents is ______.

(A) High wastes

(B) High energy requirements

(C) High yields

(D) Use of solvents

7. ___ is the range in which the atom economy is obtained for green synthesis.

(A) 72-82%

(B) 40-50%

(C) 62-70%

(D) 90-100%

8. _____ will be minimized by the microfluid reactor.

(A) Number of molecules

(B) Efficiency

(C) Solvent waste

(D) Number of collisions

9. By the conventional method, the green synthesis method is _____.

(A) More costlier

(B) Less efficient

(C) Slower

(D) More efficient

10. ___ is used in the conventional method.

(A) AlCl₃

(B) H₂SO₄

(C) Na₂SO₄

(D) NaCl

11. As compared to the conventional methods, ____ are greener.

(A) Radio waves

(B) Microwaves

(C) Ultra violet waves

(D) Electromagnetic waves

12. In _____, the di-basic acid is used.

(A) Impure form

(B) Pure form

(C) Solid state

(D) Liquid form

13. _____ is known as green chemistry.

(A) Organic chemistry

(B) Environmental chemistry

(C) Sustainable chemistry

(D) Life chemistry

14. ______ is the starting material for nylon 6-6.

(A) Adipic acid

(B) 2-methyl propyl benzene

(C) Nitric acid

(D) Acetic anhydride

15. _____ is a catalyst used in green synthesis by avoiding harmful products.

(A) Tungsten

(B) Benzene

(C) Cyclohexane

(D) Adipic acid

16. _____, green synthesis methods should have.

(A) High harmful by-products

(B) Low energy requirements

(C) Low efficiency

(D) Low atom efficiency

17. _______ can be facilitated by an ideal solvent.

(A) Titration

(B) Dissolving property

(C) Combustion

(D) Mass transfer

18. How should a desirable green solvent be?

(A) Costly

(B) Synthetic

(C) Toxic

(D) Readily available

19. The high-quality product with no ___ is produced in green synthesis methods.

(A) Good products

(B) Contamination

(C) Reaction

(D) Catalyst

20. ____ of an atom can be maximized by the green solvent.

(A) Velocity

(B) Electronic configuration

(C) Efficiency

(D) Molecular weight