The video introduces green chemistry, focusing on environmentally friendly chemical processes. It highlights the 12 principles of green chemistry, emphasizing waste prevention. The concept is likened to keeping a room tidy to minimize cleanup. The video explains that while zero waste is challenging, the principle can be applied globally. An example is given with polystyrene production, where carbon dioxide replaces harmful CFCs, reducing environmental impact.

What is the primary focus of green chemistry?

• Maximizing chemical production

• Enhancing chemical reactions

• Reducing environmental impact

• Increasing chemical complexity

How many principles are there in green chemistry?

• 5

• 8

• 10

• 12

What is the main benefit of preventing waste in chemical reactions?

• It lowers the cost of materials

• It increases the reaction speed

• It reduces the need for cleanup

• It enhances the product quality

Why is achieving zero waste in chemical reactions challenging?

• It is not supported by current technology

• It takes too much time

• It is not feasible on a global scale

• It requires expensive equipment

What is a key feature of the waste prevention principle in green chemistry?

• It is only effective in small-scale reactions

• It is only applicable to organic reactions

• It can be applied to almost all chemical reactions

• It is limited to industrial processes

What was traditionally used to expand polystyrene?

• Carbon dioxide

• Chlorofluorocarbons (CFCs)

• Methane

• Nitrogen

What is the environmental benefit of using carbon dioxide in polystyrene production?

• It reduces the release of carbon dioxide into the atmosphere

• It decreases the cost of production

• It increases the strength of polystyrene

• It makes the process faster

What is the source of carbon dioxide used in the new polystyrene expansion process?

• From natural gas

• From water vapor

• From other industrial waste processes

• Directly from the atmosphere