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प्रश्न
PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. Can you write the major difference between these two types of plastics?
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उत्तर
Thermoplastics get deformed easily on heating and can be bent easily on heating. On the other hand, thermosetting plastics when moulded once cannot be softened on heating.
Thermoplastics → Polythene and PVC
Thermosetting plastics → Bakelite and melamine
APPEARS IN
संबंधित प्रश्न
Explain why the following is made of thermosetting plastics.
Saucepan handles
Who is my partner?
| 'A' column | 'B' column |
| a. Lead glass | i. Plates |
| b. Bakelite | ii. Mattresses |
| c. Thermocol | iii. Electric bulb |
| d. Optic glass | iv. Electric switch |
| e. Polypropylene | v. Lens |
How the plastic is produced?
Can you replace the following packaging material with those which can be recycled or reused.
Glass tumblers packed in thermocol box.
HOTS
The Tamil Nadu Government has banned the use of one-time use throwaway plastics. Why do you think this is important?
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?
A syringe that is made from a type of plastic called ______.
What are the various methods of disposing of plastics?
Pet name for Buckminster Fullerene is ______.
Assertion (A): PVC is an unsafe plastic.
Reason (R): Burning PVC releases dioxins, a most toxic chemical.
