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Displaying 5 out
of 24
questions & answers.
Q1.
Fill in the blanks.
- _______________ is also called artificial silk.
- _______________ is used in fishing nets.
- _______________ fibre has elastic property.
- _______________ fibre is very comfortable to wear in summer and humid weather.
- _______________ fibre has linear and cross-linkage of small units.
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Answer:
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- Rayon
- Nylon
- Rayon
- Cotton
- Polyester
Q2.
Tick (√) the correct option.
- Which of the following fibres is made from a raw material obtained from plants?
- Nylon
- Terylene
- Polyester
- Rayon
- Plastic that can be repeatedly heated and moulded into the desired shape is
- polythene
- bakelite
- melamine
- none of the above
- Which of the following is a synthetic fibre?
- Cotton
- Wool
- Silk
- Nylon
- Which of the following is a thermosetting plastic?
- Polythene
- Melamine
- PET
- Polyvinyl chloride
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Answer:
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- (iv) Rayon
- (ii) Bakelite
- (iv) Nylon
- (ii) Melamine
Q3.
Match the columns.
| COLUMN A | COLUMN B |
| 1. Cotton | a. To make bedsheets |
| 2. Nylon | b. Synthetic fibre |
| 3. Rayon mixed with cotton | c. Natural fibre |
| 4. Rayon | d. To make carpets |
| 5. PVC | e. Heat resistant |
| 6. Melamine | f. Insulators on electric wires |
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Answer:
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- (a) To make bedsheets
- (b) Synthetic fibre
- (d) To make carpets
- (c) Natural fibre
- (e) Heat resistant
- (f) Insulators on electric wires
Q4.
Give two examples each of natural and synthetic fibres.
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Answer:
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- Cotton, Wool
- Nylon, Polyester
Q5.
Why are natural fibres preferred over synthetic fibres?
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