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प्रश्न
Should the handle and bristles of a tooth brush be made of the same material? Explain your answer.
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उत्तर
No. The handle and bristles of a tooth brush should be made of different materials. The handle of a toothbrush should be hard and strong, while the bristles should be soft and flexible.
संबंधित प्रश्न
Give examples to show that plastics are non-corrosive in nature.
Describe an activity to show that thermoplastic is a poor conductor of electricity.
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 |
What are the demerits of plastic?
Why should we be careful in using plastic bags to store cooked food items?
What can we do to reduce overuse of plastics?
Look at the following picture and explain what is happening.
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?
Most one-time-use plates are made from ______.
Pet name for Buckminster Fullerene is ______.
