Write structure of polythene. What are the types of polythene?
Identify Thermoplastic and Thermosetting Plastics from the following- Polythene
Keep a spent tubelight in a dark place. Rub it vigorouly with a thin polythene bag. What happens ? Why?
Classify the following materials as bio¬degradable and non-bio-degradable : Thermocol, glass, wood, cotton clothes, paper bags, polythene bags, nylon ropes, fruit peels.
