Q 1 – What is the other name for artificial silk?
(a) Nylon
(b) Rayon
(c) Acrylic
(d) Polyester
Ans. (b) Rayon
Q 2 – Which fibre is used as artificial wool?
(a) Acrylic
(b) Rayon
(c) Nylon
(d) Cotton
Ans. (a) Acrylic
Q 3 – The strongest synthetic fibre is
(a) nylon
(b) rayon
(c) polyester
(d) acrylic
Ans. (a) nylon
Q 4 – Wood pulp is used to make
(a) plastic
(b) wool
(c) jute
(d) rayon
Ans. (d) rayon
Q 5 – Which of the following is a natural fibre?
(a) Wool
(b) Nylon
(c) PVC
(d) Polythene
Ans. (a) Wool
Q 6 – Melamine is
(a) thermoplastic polymer
(b) thermosetting polymer
(c) fibre
(d) elastomer
Ans. (b) thermosetting polymer
Q 7 – Fibre produced in factories is called
(a) man-made fibre
(b) natural fibre
(c) synthetic fibre
(d) both (a) and (c)
Ans. (d) both (a) and (c)
Q 8 – PET is a
(a) polyester
(b) polyamide
(c) nylon
(d) thermosetting polymer
Ans. (a) polyester
Q 9 – Which of the following cannot be recycled?
(a) Toys
(b) Cooker handles
(c) Carry bags
(d) Plastic chair
Ans. (b) Cooker handles
Q 10 – The plastic which cannot be recycled is
(a) jute
(b) rayon
(c) petrochemicals
(d) Bakelite
Ans. (d) Bakelite
Q 11 – Bakelite is an example of
(a) fibre
(b) elastomer
(c) nylon
(d) thermosetting polymer
Ans. (d) thermosetting polymer
Q 12 – Which term is used for polymers made up of a large number of glucose units?
(a) Protein
(b) Fructose
(c) Cellulose
(d) Polyester
Ans. (d) Polyester
Q 13 – Which of the following is non-biodegradable?
(a) Paper
(b) Cotton cloth
(c) Wood
(d) Plastic
Ans. (d) Plastic
Q 14 – Which of the following is natural fibre obtained from plants?
(a) Cotton
(b) Wool
(c) Rayon
(d) Ketone
Ans. (a) Cotton
Q 15 – Match the following items given in Column ‘A with that in Column ‘B’.
| Column ‘A’ | Column ‘B’ |
| Cotton | Thermoplastic |
| Nylon | Polyester |
| PVC | Biodegradable |
| Bakelite | Artificial fibres |
| PET | Artificial wool |
| Acrylic | Chain of glucose units |
| cellouse | Non-biodegradable |
| Paper | Natural fibre |
| Plastic Bags | Cook wares |
| Teflon | Thermosetting |
| Column ‘A’ | Column ‘B’ |
| Cotton | Natural fibre |
| Nylon | Artificial fibres |
| PVC | Thermoplastic |
| Bakelite | Thermosetting |
| PET | Polyester |
| Acrylic | Artficial wool |
| cellouse | Chain of glucose units |
| Paper | Biodegradable |
| Plastic Bags | Non-biodegradable |
| Teflon | Cook wares |
Q 16 – Fill in the blanks with appropriate words:
- Synthetic fibres are made by ………….
Ans. human beings
2. Many small units combine to form a large single unit called a ………….
Ans. polymer
3. A nylon wire is …………. than steel wire.
Ans. stronger
4. All the synthetic fibres are prepared using raw materials of petroleum origin called ………….
Ans. petrochemicals
5. Plastics are …………. conductors of electricity.
Ans. poor
6. Nylon was prepared from …………. , …………. and ………….
Ans. coal, water, air.
Q 17 – State whether the statements given below are True or False.
1. All fibres are made up of very large units which in turn are made up of many small units. True
2. Nylon was also known as artificial silk in China. False
3. Acrylic is artificial wool. True
4. Plastics are light, strong and durable. True
5. It is not advised to store food items in plastic containers as they may react with the will of the container. False
6. Bakelite is a poor conductor of electricity. True
Q 18 – Which of the following is natural fibre?
(a) Rayon
(b) Nylon
(c) Polyester
(d) Cotton
Ans. (d) Cotton
Q 19 – Which of the following is synthetic fibre?
(a) Nylon
(b) Cotton
(c) Silk
(d) Wood
Ans. Nylon
Q 20 – The basic component of plant fibres is
(a) protein
(b) cellulose
(c) starch
(d) none of these
Ans. b) cellulose
Q 21 – Which of the following is known as artificial silk?
(a) Nylon
(b) Rayon
(c) Polyester
(d) Silk
Ans. (b) Rayon
Q 22 – In which year was nylon made?
(a) 1931
(b) 1964
(c) 1948
(d) 1950
Ans. (a) 1931
Q 23 – Which of the following fibre has the highest tensile strength?
(a) Cotton
(b) Silk
(c) Rayon
(d) Nylon
Ans. (d) Nylon
Q 24 – Common variety of polyester is
(a) terylene
(b) polymer
(c) viscose
(d) spinneret
Ans. (a) terylene
Q 25 – Polymers are made up of small units called
(a) layers
(b) molecules
(c) cells
(d) monomers
Ans. (d) monomers
Q 26 – Which of the following polyester is made by blending polyester and cotton?
(a) Terrywool
(b) Terrycot
(c) Terrysilk
(d) PET
Ans. (b) (b) Terrycot
Q 27 – Wood pulp is used to make
(a) plastic
(b) wool
(c) jute
(d) rayon
Ans. (d) rayon
Q 28 – The property of materials by which they can be moulded into any shape is called
(a) conductivity
(b) elasticity
(c) plasticity
(d) none of these
Ans. (c) plasticity
Q 29 – Which of the following is thermoplastic?
(a) Bakelite
(b) Melamine
(c) PVC
(d) All of these
Ans. (c) PVC
Q 30 – Which of the following are made from thermosetting plastic?
(a) Bottles
(b) Crockery
(c) Shoes
(d) Handbags
Ans. (b) Crockery
Q 31– Polycarbonate is used to make
(a) compact discs
(b) straws
(c) bottles
(d) jars
Ans. (a) compact discs
Q 32 – Synthetic fibres are
(a) durable
(b) wrinkle-free
(c) economical
(d) all of these
Ans. (d) all of these
Q 33 – Plastics that retain their plasticity on repeated heating are called
(a) thermosetting plastics
(b) thermoplastics
(c) thermal plastics
(d) none of these
Ans. (b) thermoplastics
Q 34 – Which of the following is a characteristic of plastics?
(a) Electrical conductors
(b) Heat conductors
(c) Biodegradable
(d) Non-biodegradable
Ans. (d) Non-biodegradable
Q 35 – Plastic that can resist fire is
(a) bakelite
(b) melamine
(c) PVC
(d) duroplast
Ans. (b) melamine
Q 36 – Which of the following is an example of animal fibre?
(a) Cotton
(b) Jute
(c) Silk
(d) Nylon
Ans. (c) Silk
Q 37 – Polywool is a mixture of which substances?
(a) Polyester + wool
(b) Polythene + wool
(c) Polycarbonate + wool
(d) Polyester + wool + cotton
Ans. (a) Polyester + wool
Q 38 – Plastic bags are generally made from which plastic?
(a) PET
(b) Polythene
(c) Bakelite
(d) Melamine
Ans. (b) Polythene
Q 39 – Which of the following is the strongest fibre?
(a) Rayon
(b) Nylon
(c) Acrylic
(d) None of these
Ans. (b) Nylon
Q 40 – Which material is used for making bottles and jars?
(a) PET
(b) Polythene
(c) Bakelite
(d) Melamine
Ans. (a) PET
Q 41– The raw materials used in making nylon are
(a) wood pulp
(b) cellulose
(c) coal, water and air
(d) all of these
Ans. (c) coal, water and air
Q 42 – The purest natural form of cellulose is
(a) rayon
(b) cotton
(c) wool
(d) silk
Ans. (b) cotton
Q 43 – Rayon clothes are comfortable to wear in
(a) winters
(b) rainy season
(c) both (a) and (b)
(d) summer
Ans. (d) summer
Q 44 – The first fully synthetic plastic was
(a) bakelite
(b) melamine
(c) Teflon
(d) polythene
Ans. (a) Bakelite
Q 45 – The non-stick coating on pans and other cooking utensils is made from
(a) rayon
(b) Teflon
(c) melamine
(d) PVC
Ans. (b) Teflon
Q 46 – Which of the following is not a part of 5R’s formula?
(a) Reduce
(b) Recycle
(c) Recover
(d) Reinvent
Ans. (d) Reinvent
Q 47 – Synthetic plastics lead to
(a) water pollution
(b) air pollution
(c) solid waste pollution
(d) all the above
Ans. (d) all the above
Q 48 – The polymers in which smaller units are linked to each other in straight arrangement are called
(a) cross-linked polymers
(b) linear polymers
(c) branched polymers
(d) none of the above
Ans. (b) linear polymers
Q 49 – A plastic which can be softened on heating and moulded repeatedly is called
(a) thermoplastic
(b) thermosetting plastic
(c) thermolabile plastic
(d) both (b) and (c)
Ans. (a) thermoplastic
Q 50 – The synthetic plastic used for making insulation cover in electrical wires/cables is
(a) bakelite
(b) melamine
(c) polyvinylchloride
(d)polystyrene
Ans. (c) polyvinylchloride
Q 51– Fill in the blanks with suitable words.
- Clothes we wear are made up of thin strands called ……………..
Ans. fibres
2. Fibres may be natural or ……………..
Ans. man-made
3. Raw materials for the preparation of synthetic fibres are obtained from substances like …………….., …………….. and ……………..
Ans. coal, petroleum, natural gas
4. …………….. are made up of small repeating units, joined together through bonds in a linear patterns.
Ans. Polymers
5. Rayon synthesised for the first time in ……………..
Ans. England
6. Artificial silk is another name of ……………..
Ans6. rayon
7. …………….. fibre is stronger than steel wire of same thickness.
Ans. Nylon
8. …………….. is the property of materials by which they can be moulded into any shape.
Ans. Plasticity
9. …………….. is an example of thermosetting plastics.
Ans. Crockery
10. Biodegradable plastics are being developed from plant materials such as …………….. and ……………..
Ans. cellulose, starch
11. Practicing 4R’s, i.e., …………….., …………….., …………….., and …………….. should be encouraged.
Ans. Reduce, Reuse, Recycle, Recover
12. A device with holes which is used to make fibres is called ……………..
Ans. spinneret
13. Acrylic resembles ……………..
Ans. wool
14. Synthetic fibres do not absorb much ……………..
Ans. water
15. Synthetic fibres …………….. on heating.
Ans. melts
16. Cotton is a polymer of …………………..
Ans. cellulose
17. Nylon was prepared from water, air and …………………..
Ans. coal
18. All polymers/plastics are …………………..
Ans. insulators
19. The use of plastics can be reduced by using bags made of ………………….. or ………………….. instead of polythene bags.
Ans. paper, jute
20. Synthetic fibers do not absorb …………………..
Ans. water
21. Nylon was prepared first in …………………..
Ans. 1935
22. Polyethylene is a ………………….. of ethene.
Ans. polymer
23. The chemical name of Teflon is …………………..
Ans. polytetrafluoroethylene
Q 52– True or False
1.Rayon is a natural fibre. False
2. Artificial silk is another name for silk. False
3. Rayon synthesised for the first time in England. True
4. Nylon was made in 1931. True
5. Polyester is the strongest synthetic fibre. False
6. Rayon is the first man-made cellulose fibre. True
7. Synthetic fibres shrink a lot when washed False
8. Terylene is a common variety of polyester. True
9. Terrywool is made by blending polyester and silk. False
10. Nylon is used in combs and toothbrushes. True
11. Bakelite and melamine are thermoplastics False
12. Synthetic fibres are moth and insect resistant. True
13. If plastics are burnt, they evolve oxygen gas. False
14. Jammu & Kashmir has banned the use of plastic bags. True
15. Plastics are corrosive in nature. False
16. Polyester is a synthetic material. True
17. Synthetic fibres shrink a lot when washed. False
18. Teflon can be repeatedly melted and moulded into new shapes. false
19. Acrylic is used for making lenses and aircraft’s window screens. true
20. Plastics are man-made material. True
21. We should use more and more polythene bags. False
22. PVC is a thermosetting plastic False
23. We get natural fibres from plants and animals. True
24. Silk is the most expensive of all-natural fibres. True
25. Plastics are biodegradable. False
Q 53 – Cellulose is made up of a large number of ………………… units.
(a) glucose
(b) fructose
(c) protein
(d) none of these
Ans. (a) glucose
Cellulose is made up of a large number of glucose units.
Q 54 – Synthetic fibres are:
(a) strong
(b) durable
(c) hining
(d) all of these
Ans. (d) all of these
Synthetic fibres are strong, durable and shining
Q 55 – Which of the following is not thermoplastics:
(a) acrylic
(b) polyethene
(c) polystyrene
(d) melamine
Ans. (d) melamine
Melamine is not thermoplastics, it is a thermosetting plastic. Acrylic, polyethene and polystyrene are thermoplastic.
Q 56 – Wire made from which fibre is strongest:
(a) nylon
(b) cotton
(c) wool
(d) steel
Ans. (a) nylon
Wire made from nylon fibre is the strongest.
Q 57 – PET is form of:
(a) steel
(b) glass
(c) polyester
(d) nylon
Ans. (c) polyester
PET is a form of polyester
Q 58 – Which of the following is used to make non-stick cookware:
(a) polyester
(b) Teflon
(c) rayon
(d) nylon
Ans. (b) Teflon
Teflon is used to make non-stick cookware.
Q 59 – Which of the following is used for making parachutes and stockings:
(a) polyester
(b) Teflon
(c) rayon
(d) nylon
Ans (d) nylon
Nylon is used for making parachutes and stockings.
Q 60 – Fabrics made of …………………. do not wrinkle easily.
(a) polyester
(b) teflon
(c) rayon
(d) nylon
Ans.. (d) nylon
Fabrics made of polyester do not wrinkle easily.
Q 61 – Wood pulp is used for the preparation of:
(a) polyester
(b) Teflon
(c) rayon
(d) nylon
Ans. (c) rayon
Wood pulp is used for the preparation of Rayon.
Q 62 – Which of the following softens on heating and then can be moulded into various shapes:
(a) thermosetting plastic
(b) thermoplastic
(c) polythene
(d) none of these
Ans. (b) thermoplastic
Thermoplastic softens on heating and then can be moulded into various shapes. Which of the following once set do not soften on heating:
Q 63 – Food hems are stored ¡n plastic containers because they are:
(a) corrosive
(b) non-corrosive
(c) easy to handle
(d) all of these
Ans. (b) non-corrosive
Food items are stored in plastic containers because they are non-corrosive.
Q 64 –. Bristles of toothbrush are made from:
(a) thermoplastic
(b) thermosetting plastic
(c) nylon
(d) PET
Ans. (c) nylon
Bristles of toothbrush are made from nylon because it is soft, flexible and strong
Q 65 – Which of the following can be recycled:
(a) carry bags
(b) plastic chairs
(c) telephone instruments
(d) cooker handles
Ans. (c) telephone instruments
Telephone instruments can be recycled as it is made up of thermoplastics.
Q 66 – Which of the following cannot be recycled:
(a) plastic toys
(b) plastic bowls
(c) plastic covering on electric wires
(d) ball point pens
Ans. (c) plastic covering on electric wires
The plastic covering on the electric wire cannot be recycled as it is made up of thermosetting plastics.
Q 67 – The fibre that burns readily with the smell of burning paper is:
(a) acrylic
(b) polyester
(c) cotton
(d) rayon.
Ans. (c) cotton
Cotton fibre burns readily with smell of burning paper.
Q 68 – Which of the following is a thermosetting plastic:
(a) PVC
(b) nylon
(c) Teflon
(d) Bakelite
Ans. (d) bakelite
Bakelite is a thermosetting plastic.
Q 69 – Which of the following is obtained from the hair of an animal:
(a) nylon
(b) silk
(c) cotton
(d) wool
Ans.. (d) wool
Wool is obtained from the hair of an animal (sheep).
Q 70 – Which of these fibres is made from raw material obtained from plants:
(a) rayon
(b) nylon
(c) terylene
(d) polyester
Ans. (a) rayon
Rayon is made from cellulose obtained from wood pulp (plants).
Q 71 – Which of the following fibre is synthetic:
(a) cotton
(b) jute
(c) nylon
(d) silk
Ans. (c) nylon
Nylon is synthetic whereas cotton, jute and silk are natural fibres.
Q 72 – Which of the following fibre is natural polymer:
(a) rayon
(b) cotton
(c) polyester
(d) polythene
Ans. (b) cotton
Cotton is a natural polymer whereas rayon, polyester and polythene are synthetic polymers.
Q 73 – Which of the following is not biodegradable:
(a) aluminium foil
(b) papers
(c) cow-dung
(d) rotten fruits
Ans. (a) aluminium foil
Aluminium foil is not biodegradable.
Q 74 – Rayon is:
(a) artificial
(b) nylon
(c) artificial nylon
(d) none of these
Ans. (a) artificial
Rayon is artificial silk
Q 75 – Polymer present in plants is:
(a) cellulose
(b) nylon
(c) rubber
(d) P.V.C.
Ans. (a) cellulose
Polymer present in plants is cellulose.
Q 76 – Natural substance is:
(a) plastics
(b) cement
(c) glass
(d) wood
Ans. (d) wood
Wood is a natural substance whereas plastics, cement and glass are man-made substances.
Q 77 – Polymer present in wood is:
(a) nylon
(b) cellulose
(c) polythene
(d) rubber
Ans. (b) cellulose
Cellulose polymer is present in wood
Q 78 – Which of the following garbage is biodegradable:
(a) broken plastics things
(b) fruit peels
(c) cement
(d) iron wastes
Ans. (b) fruit peels
Fruit peels are biodegradable.
Q 79 –…Polycot is a mixture of:
(a) polythene and cotton
(b) polyester and cotton
(c) polythene and wool
(d) polyester and wool
Ans. (b) polyester and cotton
Polycot is a mixture of polyester and cotton.
Q 80 – Polywool is a mixture of:
(a) polythene and cotton
(b) polyester and cotton
(c) polythene and wool
(d) polyester and wool
Ans. (d) polyester and wool
Polywood is a mixture of polyester and wool.
Q 81 – A synthetic fibre resembling wool is:
(a) rayon
(b) nylon
(c) acrylic
(d) none of these
Ans. (c) acrylic
A synthetic fibre resembling wool is acrylic.