Question

Which of the following is not an objective of Green chemistry?
A.It is better to prevent waste than to treat or cleanup waste after it has been created.
B.The use of auxiliary substances (e.g. solvents, separation agents, etc.) should be made unnecessary wherever possible and innocuous when used.
C.Energy requirements of chemical processes should be recognised for the environmental and economic impacts and should be minimized. If possible, synthetic methods should be conducted at ambient temperature and pressure.
D.None of the above.

Answer 1

Hint: Green Chemistry is an effort to produce and use chemical products in order to reduce or eliminate their harmful effects. The major objective of green chemistry is to use existing knowledge in order to reduce the environmental pollution.

Complete step by step answer:
Green Chemistry has a lot of advantages. These advantages include cleaner air, cleaner water,reduced waste, reduced use of petroleum products, etc. Besides these advantages, green chemistry also helps in saving money by reducing the need of costly chemicals.
There are \[12\] principles of Green Chemistry. These principles are as follow:
$1.$ Prevention
$2.$ Atom Economy
$3.$ Safer Solvents and Auxiliaries
$4.$ Designing Safer Chemicals
$5.$ Less Hazardous Chemical Synthesis
$6.$ Design for Energy Efficiency
$7.$ Reduce Derivatives
$8.$ Use of Renewable Feedstocks
\[9.\] Catalytic Reagents
$10.$ Design for Degradation
$11.$ Real-Time analysis for Pollution Prevention
$12.$ Inherently Safer Chemistry for Accident Prevention
After studying above principles, we came to know that it is better to prevent waste than to treat it after it has been created (Point $1$), the use of harmful auxiliary substances should be made unnecessary and to use safer auxiliaries (Point $3$), and the energy requirements of chemical processes should be should be minimized (Point $6$).

So, these points show that options A, B and C are incorrect and option D i.e. None of the Above is correct.

Note:
Green Chemistry is also known as Sustainable Chemistry. It leads towards Sustainable Development. Besides, some advantages of Green Chemistry, there are some disadvantages also such as high implementing costs, less information, no known alternative chemical.
Examples: Safer Dry Cleaning, Reducing lead pollution, Putting out fires the green way.