Life Cycle Analysis & Recycling
1. This question has 3 part(s).
1.1. Plastic bags given out in supermarkets are made from poly(ethene).
Supermarkets began charging for plastic bags due to their manufacture releasing carbon dioxide and being made from resources that are non-renewable.
Table 1 details methods of dealing with large numbers of used plastic bags.
Table 1
Method | Description of what happens |
Burning | Collected, transported and burned to produce energy |
Reuse | Customer can use the bag again |
Dump | Collected along with other household waste and transported to landfill sites |
Recycle | Made into new plastic items after being collected, transported, washed and melted |
Using Table 1 and your own knowledge, give one advantage and one disadvantage of each method.
1.2. Explain how carbon dioxide enhances the greenhouse effect.
Give your answer in terms of short and long wavelength radiation.
1.3. Poly(ethene is formed from the monomer ethene, shown in Figure 1.
Figure 1
Draw the repeating unit of poly(ethene).
Ai এর মাধ্যমে
১০ লক্ষ+ প্রশ্ন ডাটাবেজ
প্র্যাকটিস এর মাধ্যমে নিজেকে তৈরি করে ফেলো
উত্তর দিবে তোমার বই থেকে ও তোমার মত করে।
সারা দেশের শিক্ষার্থীদের মধ্যে নিজের অবস্থান যাচাই
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