Question

Q 3-Mention 'true' or 'false'.
(10)
1. Polymers are made up of many small molecules joined together to from long chains.
2. Some synthetic fibers are manufactured using coal, petroleum.
3. The synthetic fibres which looks like cotton is called acrylic.
4. Plastic that soften when heated and become firm again when cooledare called
thermosetting Plastics
5. Plastics thrown in water can enter into drainage line and choke the system.
6. Natural Polymers are proteins such as silk, collagen, and keratin.
7. Discarded Plastics eaten by the cows cause choking in their stomach.
8. Plastics are ecofriendly materials.
9. Nylon is used for making book covers.
10. Rayon is the fist fully synthetic fibre.​

Answer 1

Answer:

1. true

2. true

3. true

4. false

5.true

6.false

7.true

8. true

9. false

10.true

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Answer 2

Answer:

1.true

true

true

false

true

false

true

true

false

true