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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.
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संबंधित प्रश्न
Explain why plastic containers are favoured for storing food.
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 |
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Thermoplastic and thermosetting plastic.
Can you replace the following packaging material with those which can be recycled or reused.
Gift items packed with shiny material.
Look at the following picture and explain what is happening.
Explain why the following is made of thermosetting plastics?
Electric plugs/switches/plug boards
Plastics are environment friendly.
Mention a few household products in which microbeads can be found.
Polycarbonate (PC) plastic contains ______.
