We provide synthetic fibres and plastics practice exercises, instructions, and a learning material that allows learners to study outside of the classroom. We focus on synthetic fibres and plastics skills mastery so, below you will get all questions that are also asking in the competition exam beside that classroom.
List of synthetic fibres and plastics Questions
| Question No | Questions | Class |
|---|---|---|
| 1 | A material which is not easily decomposed by natural processes is termed as: A. biodegradable material B. non-biodegradable material c. recycled material D. natural material | 8 |
| 2 | Raw materials for most of the synthetic fabrics are obtained from: A. water B. air c. petroleum D. sky | 8 |
| 3 | What are natural fibres? Explain with examples. | 8 |
| 4 | 10. Which of the following are advantages of synthetic fibres: (a) They are tough and durable. (b) They are water resistant and easy to dry. (c) They do not wrinkle. (d) All of these. | 8 |
| 5 | 12. How many types of arrangement of units in plastics? Name them. | 8 |
| 6 | Natural fibres can be defined as: A. substances produced by plants and animals B. man-made fibres produced industrially C . synthetic fibres D. none of the above | 8 |
| 7 | Thermoplastics are: A. linear polymers. B. soften or melt on heating C. molten polymer can be moulded in desired shape. D. All of these | 8 |
| 8 | Polyester consists of : A. repeating unit of ether B. monomer of ester C. repeating units of ester D. monomer of ether | 8 |
| 9 | Describe an activity to show that thermoplastic is a poor conductor of electricity. | 8 |
| 10 | Nylon is obtained by: A. treating wood pulp B. solidifying water C. mixing coal, air and water D. mixing chemicals | 8 |
| 11 | Which of the following is a natural fabric? A. Polythene B. PVC c. Nylon D. Wool | 8 |
| 12 | 9. Write the uses of plastics in health care industry. | 8 |
| 13 | Which of the following do not contain polyester fabric? A. Terrywool B. Terrycot c. Terylene D. Orlon | 8 |
| 14 | Which of the following is monomer of natural rubber? A. Isoprene B. Chloroprene c. caprolactum D. styrene | 8 |
| 15 | What is recycling? A. Burning of material B. Break down the material by natural process C. Recovering and reprocessing the material into useful products D. Burying the products in land | 8 |
| 16 | is called artificial silk. | 8 |
| 17 | 8. The first fully synthetic fibre was | 8 |
| 18 | What do you observe when you are visiting a nearby tailoring shop? | 8 |
| 19 | are obtained from cotton plant and sheep respectively. A. Wool and cotton B. cotton and wool c. silk and wool D. Wool and silk | 8 |
| 20 | 6. Assertion : Nylon is used for making rock climbing ropes, parachutes, car seat belts and fishing nets. Reason: Nylon is a very strong fibre. | 8 |
| 21 | 12. Polysters are purely synthetic fibres. | 8 |
| 22 | Plastics are generally good conductors of electricity. A . True B. False | 8 |
| 23 | 3. What is the application of nylon in medical field ? | 8 |
| 24 | 1. Rayon is a semi-synthetic fibre | 8 |
| 25 | 3. Base raw material for rayon is … | 8 |
| 26 | The world’s first fully synthetic plastic was: A. Polystyrene B. Nylon c. Bakelite D. Teflon | 8 |
| 27 | Which synthetic fibre is used in making ropes for rock climbing and parachutes ? A . Nylon B. Rayon c. Polycot D. Jute | 8 |
| 28 | 10. Name a man-made fibre which was made without using natural raw materials. Nome torticles made by Avon | 8 |
| 29 | Which of the following has an ester linkage? A. Nylon – 6,6 B. Dacron c. PVC D. Bakelite | 8 |
| 30 | Which of the following are synthetic fibres? This question has multiple correct options ( A ). Wool B. cotton c. Acrylic D. Polystyrene | 8 |
| 31 | Give examples which indicate that nylon fibres are very strong. | 8 |
| 32 | Fibres can be classified as natura fibres and synthetic fibres. A. True B. False | 8 |
| 33 | Which plastic is called a fire proof plastic? A. Melamine B. Bakelite c. Teflon D. Acrylic | 8 |
| 34 | Name the plastic used for making non- stick pans: A. PVC B. Teflon c. Bakelite D. Melamine | 8 |
| 35 | surong Explain why plastic containers are favoured for storing food 5. | 8 |
| 36 | 2. Mark (V) the correct answer. Rayon is different from synthetic fibres because (a) it has a silk like appearance (b) it is obtained from wood pulp (c) its fibres can also be woven like those of natural fibres | 8 |
| 37 | Rayon has properties similar to: A. wool B. jute ( c . ) silk D. cotton | 8 |
| 38 | Which of the following does not yield wool? A . Camel B. Sheep c. Deer D. Goat | 8 |
| 39 | Cotton cloth requires to decompose. A. more than 15 years B. 10-15 years c. 100 years D. 2-5 months | 8 |
| 40 | Which of the following is thermoresistant polymer? A. Orlon B. Polythene c. Teflon D. Bakelite | 8 |
| 41 | Which of the following is considered the first thermoplastic? A. PVC B. Polystyrene c. Melamine D. Celluloid | 8 |
| 42 | Give examples which indicate that nylon fibres are very strong. | 8 |
| 43 | Which of the following best describes biodegradation? A. A minor change in an organic molecule B. Fragmentation of a complex organic molecule C. Complete transformation of the organic molecule to mineral forms D. All of the above E. None of the above | 8 |
| 44 | Plastic can be used for: A. polythene bags B. food packaging C . electrical appliances D. All of the above | 8 |
| 45 | 9. A plastic used for making crockery is ……….. | 8 |
| 46 | 9. Most plastics are biodegradable | 8 |
| 47 | Why are plastics difficult to biodegrade? A. They are not environment friendly B. Burning process is slow c. They release lot of poisonous fumes D. All of above | 8 |
| 48 | provides good heat and sound insulation. A. Propylene B. Styrofoam c. Polythene D. Acrylic | 8 |
| 49 | We come to a conclusion, that plastics are bad conductors of electricity from the following. This question has multiple correct options A. Refrigerators and freezers have a plastic foam core B. Electrical wires have a plastic covering c. cooking pans have plastic handles D. we use to prepare parachutes | 8 |
| 50 | Question 11. Which factor imparts crystalline nature to a polymer like nylon? | 8 |
| 51 | Jute fibre is obtained from the of jute plant. A . leaves B. seeds c. roots D. stem | 8 |
| 52 | Which of the following is a property of plastic? A. Flame resistant B. Non-corrosive c. Mouldable D. All of the above | 8 |
| 53 | Which of the following is known as artificial silk? A. Rayon B. Nylon c. Polyester D. Acrylic | 8 |
| 54 | is used for making carpets and blankets. | 8 |
| 55 | Assertion Plastics are non-biodegradable. Reason As they cannot be decomposed by micro-organisms. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion C. Assertion is correct but Reason is incorrect D. Assertion is incorrect but Reason is correct | 8 |
| 56 | Should the handle and bristles of a tooth brush be made of the same material? Explain your answer. | 8 |
| 57 | Preshrink cotton is called: A. natural cotton B. terycotton c. sanforized cotton D. none of the above | 8 |
| 58 | $ 1. Plastic is used for making a large variety of articles of dat use and these articles are very attractive. But it is advised avoid the use of plastic as far as possible. Why? | 8 |
| 59 | These clothes are used best in summer A. wool B. Silk c. cotton D. Nylon | 8 |
| 60 | Assertion Plastics are non-biodegradable. Reason As they cannot be decomposed by micro-organisms. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion. B. Both Assertion and Reason are correct, but Reason is not the correct explanation for Assertion. C. Assertion is correct, but Reason is incorrect. D. Assertion is incorrect, but Reasn is correct | 8 |
| 61 | A non-biodegradable waste is: A. Metallic tins B. Plastic c. Polythene D. All the above | 8 |
| 62 | 9. What is the common name of rayon ? | 8 |
| 63 | Assertion Plastic is non-biodegradable. Reason It takes many years to decompose. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion C. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect | 8 |
| 64 | Plastics are mainly used by everyone because: This question has multiple correct options A. They are cheap B. Easy to handle c. Do not break D. Light weight | 8 |
| 65 | 7. Why should we not wear synthetic clothes while working in kitchen ? | 8 |
| 66 | Name some modern fabrics formed by unstitched piece of fabric. | 8 |
| 67 | The material which is commonly used for making kitchen containers is : A. PVC B. Acrylicc c. Teflon D. PET | 8 |
| 68 | These are generally the bad conductors of heat : A. Graphite B. Copper c. Iron D. Plastics | 8 |
| 69 | Nylon has high elasticity and tensile strength. A . True B. False | 8 |
| 70 | Fill in the blank. is a natural fibre, with continuous filaments which can stretch upto ( 1 mathrm{km} ) | 8 |
| 71 | Which of the following is known as regenerated fibre? A. Nylon – 66 B. Terylene c. Nylon – 6 D. Rayon | 8 |
| 72 | Ropes made of are used in cranes and lifts. A. rayon B. nylon c. acrylic D. spandex | 8 |
| 73 | Which of the following is an animal fiber? A . silk B. Avian c. Alpaca D. All of the above | 8 |
| 74 | A person has to make electric switches and plugs. Which material is recommended ? A. Teflon B. Bakelite c. Rayon D. PVC | 8 |
| 75 | 13. Why plastics are not ecofriendly? | 8 |
| 76 | Distinguish between Thermoplastics and thermosetting plastics. | 8 |
| 77 | 1. What is plastic? Name different types of plastics. | 8 |
| 78 | 8. A synthetic fibre obtained from renewable resources is (a) Nylon (b) Polyester (c) Rayon (d) Acrylic | 8 |
| 79 | 13. Rayons are derived from cellulose. | 8 |
| 80 | Frying pan handles are made up of A. thermoplastic B. thermosetting Plastic c. rayon D. PVC | 8 |
| 81 | In India,jute is cultivated during which season? A. Rainy B. Summer c. winter D. Throughout the year. | 8 |
| 82 | Why is plastic a poor conductor? A. They are non-reactive B. They can melt C. They have high number of free electrons D. They do not have free electrons | 8 |
| 83 | Statement: The articles made of thermoplastics can be recycled whereas the articles made of thermosetting plastics cannot be recycled. State whether the given statement is true or false. | 8 |
| 84 | Which of the following is used in automobile battery casings? A. HDPE B. PP c. PVC D. Polyester | 8 |
| 85 | Match the following with the correct answers. (a) Scouring (i) Yields silk fibers (b) Mulberry leaves (ii) Cleaning sheared skin (c) Sheep (iii) Food of silk worm. (d) Cocoon (iv) Wool yielding animal. B . a – ->i, b- -> ii, c- -> iii, d- > iv ( c cdot a->-i v, b->>i i i, c-rightarrow>i i, d->i ) D. a->- ii, b- -> i, c- -> ii, d- – > iv | 8 |
| 86 | Which of the following is used for making parachutes and stockings? A. cotton B. Nylon c. wool D. Bakelite | 8 |
| 87 | Artificial (man-made) wool is known by the name: A. rayon B. acrylicc c. polycot D. none of these | 8 |
| 88 | Disposable plastic plates should not be used because: A. They are made of materials with light weight B. They are made of toxic materials c. They are made of biodegradable materials D. They are made of non-biodegradable materials | 8 |
| 89 | 5. Which of of the following comes under category of plastic? (a) pain killer strips (b) cycle tyre (c) broken toys (d) old T-shirts • 1 c u . . | 8 |
| 90 | Which material is used for making: (i) Saucepan handles (ii) Electric plugs/switches/plugboards A. Bakelite B. PVC c. Polythene D. Polyester | 8 |
| 91 | & Plastics do not corrode or rust. | 8 |
| 92 | When you visit a hill station, which of the following you should use for shopping? A. bags made up of cotton B. bags made up of polyethene c. bags made up of nylon D. none of the above | 8 |
| 93 | Polymers can be classified based on molecular forces. (a) Classify the following polymers into elastomers and fibres: Rubber, Nylon 6,6, Buna-S, Terylene | 8 |
| 94 | A lady went to the market in buy a blanket. The shopkeeper showed her blankets made of acrylic fibres as well as made of wool. She preferred to buy an acrylic blanket. Can you guess why ? | 8 |
| 95 | 2. Why is nylon called a polyamide? | 8 |
| 96 | 7. Give an important use of nylon. | 8 |
| 97 | vut 9. The major raw materials for rayon is obtained from (a) wood. (b) coal. (c) petroleum (d) both coal and petroleum. | 8 |
| 98 | Fibre obtained by chemical treatment of wood pulp is called: A. natural Silk B. rayon c. nylon D. polyster | 8 |
| 99 | Which of the following is/are common properties of plastics? (a) Non-reactive (b) Durable (c) Light in weight (d) Good conductor of electricity | 8 |
| 100 | Nylon is an example of thermoplastic. A. True B. False | 8 |
| 101 | 3. Assertion : Acrylic fabrics are used in making socks and shawls. Reason : Acrylic fabrics are replacement of wool. | 8 |
| 102 | 2. Write down the name of any 5 fibres/plastics and also mention one use of each. S.No. Fibres/Plastics Uses 3 | 8 |
| 103 | When plastics are burnt toxic substances are released into the air causing water pollution. A. True B. False | 8 |
| 104 | 4. How is rayon prepared? | 8 |
| 105 | Write uses of plastic in medical? | 8 |
| 106 | Why is plastic used in covering of electrical appliances? A. Good conductors of heat and electricity B. Durable c. Poor conductors of heat and electricity D. None of above | 8 |
| 107 | Which type of fiber is flax? A. Leaf fiber B. Bast fiber c. Animal fiber D. Fruit fiber | 8 |
| 108 | Explain why the following are made of thermosetting plastics. (a) Saucepan handles (b) Electric plugs/switches/plug boards | 8 |
| 109 | Match the terms of Column A correctly with the phrases given in Column B. | 8 |
| 110 | Why is it convenient to store plastic containers than metals? | 8 |
| 111 | Why is the name nylon given to the first fully synthetic fibre ? | 8 |
| 112 | 10. Give examples to show that plastics are noncorrosive in nature. au 1 1 1 1 11 | 8 |
| 113 | Which of the following is non biodegradable? A. Plastic B. cotton c. Paper D. Left over food stuff | 8 |
| 114 | Which of the following is a true statement? A. Plastic is soluble in water B. Plastic is not a polymer c. Rayon is made from cellulose D. All plastics are fire-resistant | 8 |
| 115 | Which plastic is used for replacing materials like glass for making bottles and jars? A. PET (polyethylene terephthalate) B. PVC (Polyvinyl chloride) c. Bakelite D. Teflon | 8 |
| 116 | 12. Plastics (a) are light (b) can be spun into fibres to make cloth and carpets. (c) can be coloured and moulded into any desired shape. (d) (a), (b) and (c). | 8 |
| 117 | 3. Match Column-I with Column-II and select the correct answer using the code given below the columns. Column-I Column-II (A) Natural fibre (p) Terylene (B) Synthetic fibre (q) Rain coats (C) Semisynthetic fibre (1) Wool (D) Rubber (s) Terry wool (a) A-(r); B-(p); C-(s); D-(q) (b) A-(9); B-(p); C-(s); D-() (c) A-(r); B -(p); C-(q); D-(s) (d) A-(s); B-(p); C-(); D-(9 | 8 |
| 118 | State whether true or false: Plastics are insoluble in water A. True B. False | 8 |
| 119 | Thermosetting plastics can be remoulded on gentle heating. A. True B. False | 8 |
| 120 | 3. Which of the following synthetic fibre has most wide applications? (a) Nylon (b) Polyester (C) Acrylic (d) Polyolefin | 8 |
| 121 | 14. ‘Manufacturing synthetic fibres is actually helping for conservation of forests’. Comment. | 8 |
| 122 | 1. Explain why some fibres are called synthetic. | 8 |
| 123 | State whether true or false: Natural fibres are obtained from plants and animals. A. True B. False | 8 |
| 124 | Why HF acid is stored in plastic bottles? | 8 |
| 125 | State whether true or false: Ropes made by rayon are used in cranes and elevators. A. True B. False | 8 |
| 126 | Name two varieties of cloth materials which are commonly used. | 8 |
| 127 | Polywool is made by blending polyester and : A. acrylic B. rayon c. cotton D. wool | 8 |
| 128 | Pashmina a type of wool is obtained from: A . camel B. goat c. sheep D. artificially | 8 |
| 129 | is usually picked by hands and fibres are then separated from the seeds by combing. A. Jute B. Moonj c. cotton D. None of the above | 8 |
| 130 | 12. Avoid plastics as far as possible’. Comment on this advice. 13. Match the terms ofcolumn I correctlywith the nel | 8 |
| 131 | Synthetic fibres having almost common property are: A. nylon and polyster B. nylon and plastics c. polyster and plastics D. all of the above | 8 |
| 132 | Electrical wires have a coating of an insulated material. The material generally used is : A. sulphur B. graphite c. PVC D. None of the above | 8 |
| 133 | Fibres obtained from plants and animals are called: A. man made fibres B. natural fibres c. organic fibres D. none of the above | 8 |
| 134 | Polyester is a natural fiber. A. True B. False | 8 |
| 135 | The first man – made polymer is : A. PVC B. Teflon c. Bakelite D. Nylon | 8 |
| 136 | Cooking pans have plastic handles. A. True B. False | 8 |
| 137 | True or False Natural fibres are obtained from plants and animals where as synthetic fibres are obtained by chemical processing of petrochemicals. | 8 |
| 138 | Moonj is used to make furniture. A. True B. False | 8 |
| 139 | What are natural fibres ? Give two examples. | 8 |
| 140 | Nylon is obtained from : A . coal B. air c. water D. all of the above | 8 |
| 141 | 5. Despite being very useful it is advised to restrict the used plastic. Why is it so ? Can you suggest some methode to limit its consumption ? | 8 |
| 142 | 7. The synthetic fibres are also known as ……. . fibres то | 8 |
| 143 | Plastics are eco-friendly. A. True B. False | 8 |
| 144 | Which of the following material take the Iongest to degenerate? A. Paper B. cotton cloth c. Tin can D. Plastic bags | 8 |
| 145 | 20. Polycot is obtained by mixing a) polyester and cotton (1) polyester and wool (c) cotton and wool (d) None of these | 8 |
| 146 | Which of the following statement is true? A. A nylon thread is stronger than a steel wire B. Rayon is a natural fibre made from wood pulp C. Cotton is not a polymer D. Fabric made from polyester can get wrinkles easily | 8 |
| 147 | 12. AVIU puno 13. Match the terms of column I correctly with the phrases given in column II. Column-1 Column-II (i) Polyester (a) Prepared by using wood pulp (ii) Teflon (b) Used for making parachutes and stockings (iii) Rayon (c) Used to make non-stick cookwares (iv) Nylon (d) Fabrics do not wrinkle easily | 8 |
| 148 | Categorise the materials of the following products into ‘can be recycled’ and ‘cannot be recycled’. Telephone instruments, plastic toys, cooker handles, carry bags, ball point pens, plastic bowls, plastic covering on electrical wires, plastic chairs, electrical switches. | 8 |
| 149 | Polymeric organic materials are called: A . elastics B. plastics c. polythenes D. None of these | 8 |
| 150 | Which of the following material is not used in making plate? A. steel B. Glass c. Plastics D. Leather | 8 |
| 151 | Which of the following statement is true about PVC (polyvinyl chloride) and polythene? A. They are thermoplastics B. They are thermosetting plastics c. They are examples of natural substances D. They are natural fibres | 8 |
| 152 | 8. Name any two commonly used plastics. | 8 |
| 153 | Assertion Plastic is not responsible for utilising a major share of the world’s oil or hydrocarbon resources Reason plastics use less than ( 4 % ) of the world’s hydrocarbon resources. Approximately ( 90 % ) is consumed for transportation, power generation and heating. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion C. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect | 8 |
| 154 | Write uses of melamine plastic. | 8 |
| 155 | Which out of the following is used for making disposable cups? A. LDFE B. PS ( c cdot P P ) D. PVC | 8 |
| 156 | An example of natural fibre is : A . Nylon B. Rayon c. Jute D. Terylene | 8 |
| 157 | 15. Synthetic fibres are generally hydrophilic. | 8 |
| 158 | 2. Nylon is corrosion resistant | 8 |
| 159 | Match the terms of column I correctly with the phrases given in column II. | 8 |
| 160 | All are natural fibres except A . silk B. cotton c. Nylon D. wool | 8 |
| 161 | 1. Why is rayon called a regenerated fibre? | 8 |
| 162 | … is the synthetic fibre used as wool. 7 1 1 | 8 |
| 163 | 16. We can mould plastics into various shapes because of the property of elasticity in them. | 8 |
| 164 | 5. Plastics are (a) salts (c) polymers (b) acids (d) solvents | 8 |
| 165 | 10. Say no for polythene bags and say yes for paper bags. Comment on this slogan. | 8 |
| 166 | 1. Plastics (a) are organic material of high molecular weight (b) are polymers having long chains (c) are made by the process of polymerisation (d) only (a) and (b) are correct | 8 |
| 167 | Containers which are light weight, lower price, good strength and easy to handle is made up of : A. Plastic B. Metal c. wood D. Brick | 8 |
| 168 | State whether true or false: Bakelite is the first synthetic thermosetting plastics. A. True B. False | 8 |
| 169 | The IUPAC name for Teflon is: A. polytrifluoroethane B. polytetrafluoroethane c. polytrifluoroethylene D. polytetrafluoroethylene | 8 |
| 170 | Statement: Teflon doesn’t stick to the materials and can be easily used in non-sticky pans and other cookware. A. True B. False | 8 |
| 171 | When we burn nylon, why we do not get the smell of burning paper or burning hair? | 8 |
| 172 | Polystyrene and PVC are thermoplastics A. True B. False | 8 |
| 173 | fibres are obtained from plants and animals. A. Natural B. Plant c. Animal D. Synthetic | 8 |
| 174 | 3. Select the synthetic polymer whose filament was first obtained that could be streched several times its original length (a) Nylon (b) polyester (c) Acrylic (d) none of these. | 8 |
| 175 | Assertion The handle and bristles of a tooth brush should be made of different material Reason The handle of a toothbrush should be | 8 |
| 176 | Cotton fibers are separated from seeds by: A. combing B. knitting c. weaving D. rubbing | 8 |
| 177 | 11. Name two articles made by rayon, | 8 |
| 178 | 1. Match Column-I with Column-II and select the correct answer using the code given below in the columns. Columns Column-II (A) Rayon (p) Polymer of diacid and diamine B) Nylon (q) Terylene (C) Polyester ) Regenerated cellulos D) Polystyrene (s) Light foam used for insulating and packing (a) A-(); B-p); C-(q); D-(s) 6) A-(s); B-(); C-(q); D-() (c) A-(t); B-9); C-(p); D-(s) (d) A-); B-(s); C-@); D-(0) 1_T alent the | 8 |
| 179 | Yarn can be converted into fabrics by the process of spinning. A . True B. False | 8 |
| 180 | Which type of cloth dries faster in rainy season? A. cotton B. Wool c. Polyester D. silk | 8 |
| 181 | Use of charkha was popularized by Mahatma Gandhi as part of the Independence movement. A. True B. False | 8 |
| 182 | State True or False. Polystyrene and PVC are thermoplastics | 8 |
| 183 | Plastic is bad for environment because: A. they are non-biodegradable B. they harm aquatic life C. they are toxin carrier D. all of these | 8 |
| 184 | 6. Common name of PETE is terylene | 8 |
| 185 | 11. Should the handle and bristles of a tooth brush be made of the same material? Explain your answer. | 8 |
| 186 | 4. The hard plastic covers of telephones are made of polymers of (a) styrene (b) acrylonitrile (c) ethene (d) none of these | 8 |
| 187 | Animal fibers generally comprise of: A. collagen. B. keratin c. both ( A ) and ( B ). D. triglycerides. | 8 |
| 188 | Which of the following are examples of transparent material? A . Glass B. water c. Plastic D. All of these | 8 |
| 189 | Which of the following is an example of soft and fine wool? A. Merino B. cotswold c. Both A and B D. None of them | 8 |
| 190 | 10. Plastic melamine is fire resistant. | 8 |
| 191 | 4. Tensile strength of nylon is …………… than that of cotton. plastic | 8 |
| 192 | Which of the following are natura fibres? A. wool, cotton, nylon, jute B. jute, silk, rayon, wool c. silk, cotton, wool, jute D. silk,jute, cotton, polyester | 8 |
| 193 | is a popular polyester. A. Plastic B. Polythene C . Rayon D. Terylene | 8 |
| 194 | The two types of arrangements of plastics are : A . linear B. cross linked c. both A and B D. None of above | 8 |
| 195 | Assertion : Clothes made up of synthetic fibre are unsuitable for hot and humid weather. Reason: Synthetic clothes not breathe so well | 8 |
| 196 | Rayon or artificial silk is obtained from : A. cocoon B. petroleum c. silk fibre D. wood pulp | 8 |
| 197 | Assertion Plastic grocery bags do not block drains during rains. Reason Plastics are lighter than water and hence float over water Read the above assertion and reason and choose the correct option regarding ¡t. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion C. Assertion is correct but Reason is incorrect D. Both Assertion and Reason are incorrect | 8 |
| 198 | Assertion Bakelite is first completely synthesized thermoplastic. Reason Thermosetting plastics are harder. A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion C. Assertion is correct but Reason is incorrect D. Assertion is incorrect but Reason is correct | 8 |
| 199 | Which of the followings prove that plastics do not make food and medicine toxic? A. Milk pouches B. Edible oil container c. Ice-cream packs D. All of these | 8 |
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