Question

1. Distinguish between thermoplastics and thermosetting plastics.
2. Give examples to show that plastics are non-corrosive in nature.
3. Should the handle and bristles of a tooth brush be made of the same
material? Explain.
4. Avoid plastics as far as possible. Comment on this advice.
5. Describe an activity to show that thermoplastic is a poor conductor of
electricity.

Answer 1

Answer:

ur all answers all above

Explanation:

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Answer 2

Answer:

1. Please check the attached file for the answer of 1st.. Last point is missing there.. that is

• Of thermosetting - examples are bekalite and plaskon
• Of thermoplastic - examples are PVC, polythene and nylon..

2. Pickles usually come packed in plastic sachets or glass bottles. Pickles contain acids, yet no harm is done to the plastic sachet. Sanitary cleaners and some acids; which are used as bathroom cleaner are sold in plastic bottles. These examples show non-corrosive nature of plastic.

Or..

Plastics are non-corrosive in nature, they do not react even if they come in contact with strong chemicals. For example, the cleaning chemicals that we use at home are stored in plastic bottles, instead of metal containers.

U can write any from the above...

3. 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.So the handle of toothbrush should be made up of plastic and bristles of nylon.

4. Plastics are very useful, but it causes serious environmental and health concern :

(a) Plastics are non-biodegradable.

(b) Careless disposal of plastic bags, chokes, drains and blocks the soil.

© If eaten by cows, it can kill them.

(d) Plastic bags can also contaminate foodstuffs due to poisonous dyes getting absorbed.

(e) Thus, plastics should be avoid as much as possible..

5. See the attached file again to get the answer of 5th one...You just need to write it in the activity form that is

Aim:To show that thermosetting plastics are poor conductor of electricity..

Materials required :

Theory:(optional in this)

Procedure:(it should be in points)

Observation:

Conclusion:

Precautions:(optional)

Other details is in the file, pls check it..

I hope it will help you out...

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