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प्रश्न
Write short note.
Uses of plastic.
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उत्तर
- Melamine is used in domestically useful items like cup, saucers, plates, trey, spare parts of airplane engine and sound insulating coverings etc.
- Polyurethane is used in surfing boards, small boats, furniture, seats in vehicles etc.
- Bakelite is used for making cabinets of radio, T.V., telephones, electric switches, toys, coverings over handles of cookers etc.
- Polyester is used for making fiberglass, toners of laser printers, textile industry etc.
- Polypropylene is used for making parts of loudspeakers & vehicles, ropes, mattresses, laboratory appliances etc.
- Polyethene is used for making milk bags, packing bags, flexible garden pipes etc.
- Polystyrene is used for making thermo-insulating parts of electric appliances like refrigerators, gears of the machine, toys, protective coverings like covers of CD and DVD etc.
- Polyvinyl chloride is used for making bottles, raincoat, pipes, handbags, shoes, electric cable insulation, furniture, ropes, toys etc.
संबंधित प्रश्न
Describe an activity to show that thermoplastic is a poor conductor of electricity.
Distinguish between.
Man made material and natural material.
Explain the effect of following materials on environment and human health.
1. Plastic
2. Glass
3.Thermocol.
Which measures will you arrange to minimize the environmental problems arising due to non-degradable plastic?
Can you replace the following packaging material with those which can be recycled or reused.
Milk packets of polythene.
A good application of plastic is the use of ______
True or False
Refuse (avoid) is the best way to manage plastic.
A plastic bag dumped in the soil stays without breaking down for 500 years. If a new generation starts in every 30 years, how many generations would it take to see the plastic bag finally broken down?
Read the following information and convert them into a graph to compare the countries and the amount of plastic they use.
China contributes the highest share - that is around 28%, of the total plastic used globally. Indonesia uses 10%, both the Philippines and Vietnam use 6% each; Thailand uses 3.2%, Egypt 3%, Nigeria 2.7% and South Africa 2%.
Plastics have completely occupied our life. Why?
