/ca 1 << When heated in the correct conditions, the non-carbon constituents evaporate away. 7. These are used in the manufacture of detergents, fibres (polyester, nylon, acrylic, etc. stream << endobj /Length 50 /Subtype /Form T(�2�331T015�3� S��� Ask your question. In an advanced society like ours we all depend on composite materials in some aspect of our lives. which is very close to the process of fibre production used for making man-made fibres. Fibre used for making gunny bag is (a) Wool (b) Jute (c) Silk (d) Cotton (b) Jute. >> 6 0 obj << T(�2P�01R0�4�3��Tе01Գ42R(JUW��*��)(�ԁ�@L=��\.�D��b� Name two items that are made from coconut fibre. Jute" is the name of the plant or fiber used to make burlap, hessian or gunny cloth. Write the name of animal fibre? These are termed as 'Petrochemicals'. /Matrix [1 0 0 1 0 0] /x14 6 0 R 8. Denim, used to make jeans, is made from cotton. /XObject It is used in the form of cloths, in making house pipes of fire extinguishers. Why do we need to wear clothes? First synthetic fibre formed from natural material is: (a) Rayon. Single use face masks are primarily suited for use in one shift – in other words a service life of eight hours. Husk and bones are not used for making fibres, This site is using cookies under cookie policy. /Length 457 >> stream << @�Svgvfv�����h��垼N�>� _���G @}���> ����G��If 0^qd�N2 ���D�� `��ȒY �VY2 ���E�� `$�ȒY �#�,� �(�ȒY �!Y2 �d#Kf �/�&�ȒY ��b�|e�, �]Mf 0� �4d ӐY LCf 0 � �4d ӐY LCf 0 � �4d ӐY LCf 0 � �4d ӐY LCf 0 � �4d ӐY LCf 0 � �4d ӐY LCf 0 � �4d ӐY LCf 0 � �4d ӐY LCf 0 � �4d ӐY LCf 0 � �0A֠� �5jФNl\��ud #D�jy��c&�?g��ys?zuܽW_p�^2 �^Qջ�3����3ssmBa����}l˚���Y tIhyכkN�y��3�%8�y� The cotton plant is a shrub. /a0 Natural fibres are /Subtype /Form x���1 �O�e� ��� /S /Transparency 11. Across. Log in. /BBox [0 0 456 455] The following is an answer given by Boojho to a question asked by his teacher- “Cotton, wool, silk and jute are classified as natural fibres whereas nylon and polyester are classified as synthetic fibres”. ������, �� U]�M�G�s�4�1����|��%� ��-����ǟ���7f��sݟ̒Y @��x^��}Y�74d�С{=T�� ���I9��}�!��-=��Y�s�y�� ���:t��|B�� ��W�`�_ /cR C� @�t������0O��٥Cf��#YC�&. 5. /Interpolate true Answer: Yarns are made up of thin strands called fibres. A type of fibre obtained naturally from cocoon (4) 6. Polythene (Poly + ethene) is a common example of a plastic. /Resources << /AIS false /XObject << Let us learn more about plant fibres. Polyester is a synthetic fiber derived from coal, air, water, and petroleum. Which statement out of the following is incorrect? endobj >> 1. The oldest indication of fibre use is probably the discovery of flax and wool fabrics at excavation sites of the Swiss lake dwellers (7th and 6th centuries bce). stream a substance made by a chemical process, used for making many different things, for example fibres for cloth and paint. In this process, a mass of cotton wool are drawn out and twisted. 9 0 obj Polyester (Poly + ester) is made up of the repeating units of a chemical known as an ester. Substance made up of large number of smaller molecules (7) 4. << widely used varieties of FRP are glass‐fibre‐reinforced‐polymers (GFRP). Boojho went to a cloth shop. However, for special activities with toxic hazardous substances the masks can only be used once. Ask your question. /Resources 4 0 R /Interpolate true Polyester is light, strong and easily dyed, can be woven or knitted and is easily blended with other fibres. /a0 << >> 11 0 obj We can see that the cost range is subject to considerable variation Plastic is also a sort of polymer like the synthetic fiber. 8 0 obj 5 0 obj These fibres are also called artificial or man-made fibres. Substance used as synthetic wool (7) 2. The rate at which it produces a 1 to 2 kilometer long filament is close to 50 cm. /ColorSpace /DeviceGray It is also used for making floor tiles, kitchenware, in aeroplanes and buses to prevent the spread of fire. Some synthetic fibres are listed below. /Subtype /Form >> PLANT FIBRES. Coal tar. In this process, a mass of cotton wool are drawn out and twisted. Millions of tons are produced every year. /Interpolate true It is produced from flowering plants in the genus Corchorus, which is in the mallow family Malvaceae.The primary source of the fiber is Corchorus olitorius, but it is considered inferior to Corchorus capsularis. " Polyester is used in making ropes, nets, raincoats, jackets, etc. Write the name of some man-made fibre? In this reaction, two or more molecules combine to make a large … C. CNG. Wool is obtained from hair of animals like sheep, yak etc. /a0 Join now. << /BBox [0 0 596 842] Cotton, nylon, wool., etc., are all fibres. endobj /BitsPerComponent 1 /BitsPerComponent 1 /Type /XObject was developed in the late 1940s and was the first modern composite. /XObject /Length 56114 /Filter /FlateDecode This means that each time the mask is taken off, a new one must be used (for example, when working with carcinogenic substances). /Width 2480 Synthetic Fibres Examples. >> /Type /XObject Now we have some fibres which are made from chemical substances. /XObject /Length 82 >> >> ), polythene and other manmade plastics. x�e�1 This brings the fibres together to form yarn. View All Answers (0) Submit Your Answers. /Length 63 /I true Explain the process of making yam from fibre. Tencel is usually used as a substitute for cotton or silk. Materials used for making clothes are known as fibres. Complete the crossword given below with the help of clues. A chemical-intensive crop, conventional cotton accounts for 25% of the insecticides used worldwide. A synthetic fibre classified as polyester (8) 7. Synthetic fibre, man-made textile fibre produced entirely from chemical substances, unlike those man-made fibres derived from such natural substances as cellulose or protein. /Interpolate true /x5 3 0 R /CA 1 /Height 3508 Fibres that are made by man from chemical substances are called synthetic fibres. /BitsPerComponent 8 It is used in the form of cloths, in making house pipes of fire extinguishers. (i) Ropes (ii) Mats. x�+� << Starting from bottle flakes, the viscosity can be set via the degree of drying. Jute is a natural plant fibre. The filaments of glass that are produced are extremely thin and can be woven into sheets or made into puffy substances that are used in soundproofing and insulation. It is used in the firefighters' uniforms for the protection of their body from heat hazards. Such fibres which are made from chemical substances are called synthetic fibres. /Filter /FlateDecode They include nylon, acrylic, polyester and so on. %PDF-1.3 {xl��Y�ϟ�W.� @Yқi�F]+TŦ�o�����1� ��c�۫��e����)=Ef �.���B����b�nnM��$� @N�s��uug�g�]7� � @��ۘ�~�0-#D����� �`�x��ש�^|Vx�'��Y D�/^%���q��:ZG �{�2 ���q�, Question: Explain the process of making yam from fibre. (b) Acrylon. It grows well in black soil and warm climate. << A filament is a long strand of a single substance. >> You can specify conditions of storing and accessing cookies in your browser, Which set of substances is not used for making fibres, tick the correct answer the intensity of sound produced by alarm clock is , What is the difference between friction and force?, hlow friends tell me ans plz I have many questions like this I'll ask ., [tex] {/LARGE{/underline{/underline{/bf{Hello }}}}}[/tex] Good Morning, please inbox yaar please koi to kar do inbox I am girl...☺☺ please , why Oxygen is essential for leaving bing. /Height 1894 /Subtype /Form /CA 1 /ExtGState x���1 �O�e� ��� These MCQ Questions on Synthetic Fibres and Plastics Class 8 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Write an activity to show that synthetic fibres are stronger than the cotton fibres. << Man-made fibres are smooth. The modern textile industry is unthinkable today without synthetic fibres. /BBox [0 0 595.2 841.92] /s13 7 0 R >> 1. Q.5. %���� Silk fibres are obtained from silkworm.It is drawn from the cocoon of silkworm. Substance used as synthetic wool (7) 2. >> In order to protect the … All clothes are made up of threads. PET is one of the familiar form of polyesters and it is used for making utensils, bottles, films, wires, and many other useful products. B. << Fibres are also made from chemical substances which are not obtained from natural sources.The fibres which are prepared from chemical substances in industry are called synthetic fibres. /Type /XObject >> /Height 3508 Solving the Synthetic Fibres and Plastics Multiple Choice Questions of Class 8 Science Chapter 3 MCQ can be of extreme help as you will be aware of all the concepts. endobj << /BitsPerComponent 1 Sometimes cellulose (the main component of cotton fiber) and pulp of wood are used to make materials such as acetate and rayon (artificial silk). /ca 1 A plastic used for making containers and carry bags (9) 3. << >> per hour. B. Polythene. /Type /ExtGState endstream The polymer is a chemical substance consisting of large molecules made from many smaller molecules: some polymers, such as nylon, are artificial. Substance made up of large number of smaller molecules (7) 4. Answer: (A) Coal tar. Several vegetable fibres were also used by prehistoric peoples. /Type /XObject /BBox [0 0 456 455] �0�{�~ �%���+k�R�6>�( 17. Passage - 1 For thousands of years natural fibres were the only ones available for making fabrics. A Silk, chemicals B Yak hair, camel hair C Husk, bones D Flax, wool. 1. << There he found a fabric which was smooth to touch, had vibrant colour and shine. >> endobj Fibreglass GLOSSARY Fibreglass A composite material made of fine glass fibres woven into a cloth then bonded together with a synthetic plastic or resin. Join now. Jute is a long, soft, shiny bast fiber that can be spun into coarse, strong threads. x�+�215�35S0 BS��H)$�r�'(�+�WZ*��sr � >> << Which of these is used for making naphthalene balls? Front: Back: How has chemistry and technology helped farming over the years? /Length 106 stream Answer: Silk and wool What is caterpillar? There are 4 different types of Synthetic fibre. /Filter /FlateDecode /Width 2480 Answer: Jute is used mainly for making gunny bags, shopping bags, ropes, carpets, etc. /Width 1894 /ColorSpace /DeviceGray Medium sized weaving machine run on power, used to produce cotton clothes on large scale is called (a) Handloom (b) Weaving machine (c) Stitching machine (d) Power loom (d) Power loom. Today, glass-reinforced fiber or fiberglass is used in the manufacturing of a number of products, ranging from automobiles to aircraft to hot tubs and shower enclosures. /G 13 0 R endobj �,,��l��u��4)\al#:,��CJ�v�Rc���ӎ�P4+���[��W6D����^��,��\�_�=>:N�� x�+� /ExtGState (d) Polyester. �0FQ�B�BW��~���Bz��~����K�B W ̋o endstream >> Cotton. >> heat better than other plastics. Synthetic fibres are those which are man-made and are obtained by the combination of different types of chemical substance and raw materials such as petrochemicals. Which set of substances is not used for making fibres? /Height 1894 Black soil is needed for the cultivation of cotton. Carbon fibres: Carbon fibres are made from long chains of carbon atoms and … endstream Ans. This article reviews the composition, structure, and properties of man-made fibres, both regenerated and synthetic, and then describes the ways in which they are spun, drawn, and textured into useful fibres. >> The silkworm secretes a viscous fluid from its glands located somewhere below its jaw and then wraps itself with the filament so extruded to form a cocoon. /Type /Group /Type /Mask /CS /DeviceRGB endstream /Type /XObject (a) Silk, chemicals (b) Yak hair, camel hair (c) Husk, bones (d) Flax, wool 6. >> /Resources Polyester, a synthetic fibre derived from oil, is the world’s most commonly used fibre. Gunny bags, ropes, curtains 6. a chemical substance that is used to make plastic, fibres for cloth etc. /x19 9 0 R /ColorSpace /DeviceGray Man-made fibres like silk have always been greatly valued for its gloss and fineness. Which set of substances is not used for making fibres? /x10 8 0 R �[i&8n��d ���}�'���½�9�o2 @y��51wf���\��� pN�I����{�{�D뵜� pN�E� �/n��UYW!C�7 @��ޛ\�0�'��z4k�p�4 �D�}']_�u��ͳO%�qw��, gU�,Z�NX�]�x�u�`( Ψ��h���/�0����, ����"�f�SMߐ=g�B K�����`�z)N�Qd�Y ,�~�D+����;h܃��%� � :�����hZ�NV�+��%� � v�QS��"O��6sr�, ��r@T�ԇt_1�X⇯+�m,� ��{��"�1&ƀq�LIdKf #���fL�6b��+E�� D���D ����Gޭ4� ��A{D粶Eޭ.+b�4_�(2 ! -Chemical pesticides and fertilizers help produce higher yeilds, Automatic barn cleaners and feeders are used Large tractors and cultivators allow one person to do the work of many. A plastic used for making containers and carry bags (9) 3. They can be distinguished by looking at a cross-section. Also, since the amine oxide used to make this fabric can be recovered, making lyocell fabric is much less wasteful than making rayon. endobj It overtook cotton use in 2002 and, with other synthetic fibres, makes up more than 65 per cent of fibres used in the textile and apparel industry. Developed in a 20th-century laboratory, polyester fibers are formed from a chemical reaction between an acid and alcohol. Synthetic fibres can be mass-produced to almost any set of required properties. << Examples are nylon, rayon, polyester, and acrylic. /SMask 12 0 R The following is an answer given by Boojho to a question asked by his teacher— “Cotton, wool, silk and jute are classified as natural fibres whereas nylon and polyester … /ca 1 /S /Alpha << A. PVC. lizaashif7721 lizaashif7721 3 weeks ago Science Secondary School +5 pts. /ExtGState Other, but less commonly available, fibre feedstocks are Aramid and Carbon fibres; their approximate average cost are given in Table 1 and Figure 1. Fibres are very thin, thread like strands from which fabrics (or cloth) are made. /ColorSpace /DeviceGray (c) Nylon. /Width 1894 Statement incorrect for synthetic fibres is/are: (a) non-biodegradable. stream The process of arranging two sets of yarn together to make a fabric is called weaving. /Filter /FlateDecode which set of substance are not used in making fibre a-silk,chemicals b- yak hair,camel hair c-husk,bones d-flax,wool experts waiting for your reply - Social Science - Physical Features of India Which part of the jute plant is used for getting jute fibre? 1 0 obj Which set of substances is not used for making fibres? 4 0 obj /ca 1 Mention uses of jute fibre? How Is Lyocell Fabric Used? The process of making yam from fibres is called spinning. Another name for this compound is artificial silk (5) Down 5. 7 0 obj Myelin is composed of about 40% water and the dry mass is … This fabric feels like soft cotton, and it is used to make everything from dress shirts to towels to underwear. << 3 0 obj Cards In This Set. /Length 1076 12 0 obj /Subtype /Image /x6 2 0 R /Resources 5 0 R Yarns are made up of thin strands called fibres. Silk is obtained from silkworms and nylon is a man made fibre which is synthesised in factories using chemicals. Residue from these poisons are transferred from soil to boll making their way into the fibers of our conventional cotton clothing. >> The process of making yam from fibres is called spinning. C�|�@ ��� Petroleum. >> Even the smallest dose of pesticide exposure has been linked to brain, fetal damage, and sterility in humans. Q.6. /Filter /FlateDecode Answer: Rayon, nylon, polyester, acrylic, etc. � << �%� ��yԂC��A%� x'��]�*46�� �Ip� �vڵ�ǒY Kf p��'�^G�� ���e:Kf P����9�"Kf ���#��Jߗu�x�� ��L�lcBV�ɽ;���s$#+�Lm�, tYP ��������7�y`�5�];䞧_��zON��ΒY \t��.m�����ɓ��%DF[BB,��q��_�җ�S��ި%� ����\id펿߾�Q\�돆&4�7nىl7'�d �2���H_����Y�F������G����yd2 @��JW�K�~T��M�5�u�.�g��, gԼ��|I'��{U-wYC:,Mi�Y2 �i��-�. The myelin sheath of nerve fibres was first discovered and described by Rudolf Virchow in 1854. /Subtype /Image /Filter /FlateDecode /Filter /FlateDecode Which substance was used in making soap 100 years ago? Can you tell what question the teacher has asked? The resulting fiber is 93–95% carbon. In textile yarn, individual fibers or filaments are wound together to make threads. /SMask 10 0 R Weaving is the process of making fabric with the use of set of two threads, crossing under and over each other. See Man-Made A. DIRECTIONS: Read the passage (s) given be low and answer the questions that follow. /CA 1 endobj Which set of substances is not used for making fibres - 25338062 1. D. Paraffin. /Subtype /Image The most common method of making carbon fiber is the oxidation and thermal pyrolysis of an organic precursor, polyacrylonitrile (a polymer fiber based on acrylonitrile.) << /CA 1 The additional use of TiO 2 is necessary for full dull or semi dull yarn. Synthetic grass, which has been used on tennis courts is made from Nylon. Carbon fibres: Carbon fibres are made from long chains of carbon atoms and the incident of corrosion doesn't take place. x���t�������{E�� ��� ���+*�]A��� �zDDA)V@�ޛ��Fz���? >> /ExtGState endstream High-speed spinning processes for the manufacture of POY normally need a viscosity of 0.62–0.64 dℓ/g. Proteins and DNA are natural polymers. /Subtype /Image << The fabric could be (a) Cotton (b) Wool (c) Silk (d) Jute 7. Weaving can be used to make rugs, sweaters, knitting, lace making, table mat making etc. endobj endstream /Filter /FlateDecode endstream /Type /XObject Instead of PAN as a precursor, carbon fiber can also be manufactured from pitch or rayon. The use of natural fibres for textile materials began before recorded history. stream 11. >> Ans. Many useful substances are obtained from petroleum. A fiber is a small short piece of hair. /FormType 1 /Type /XObject 2 0 obj Which set of substances is not used for making fibre Silk chemical or York channel has or has bone of class sc… Get the answers you need, now! (a) Silk, chemicals (b) Yak hair, camel hair (c) Husk, bones (d) Flax, wool << stream This means that each time the mask is taken off, a new one must be used (for example, when working with carcinogenic substances). Because of its great strength, it is used in making hosiery, textiles, ropes, upholstery, tooth brush bristles, paint brushes, fishing lines and nets, tennis racquets, sewing thread, syringes, spectacle frames, zip fasteners and vehicle tyres blended with rubber. << 10. >> endobj (a) Rayon. Answer: The larva of silk-moth is called caterpillar. Cotton, jute, coir, silk cotton, hemp, and flax are examples of plant fibres. Under cookie policy is using cookies under cookie policy jute is a long, soft shiny! Starting from bottle flakes, the viscosity can be mass-produced to almost set! Technology helped farming over the years materials began before recorded history of polymer like the synthetic.... Spun into coarse, strong and easily dyed, can be set via the degree of drying ethene ) made...: jute is a small short piece of hair, air,,! Acid and alcohol Rayon, nylon, polyester, acrylic, polyester fibers are from... Be low and answer the questions that follow fiber is a man made fibre which is synthesised factories. Knitted and is easily blended with other fibres below with the use of natural were. Thin strands called fibres in aeroplanes and buses to prevent the spread of extinguishers... From silkworms and nylon is a natural plant fibre jute '' is the process of fibre naturally!, the non-carbon constituents evaporate away composite materials in some aspect of our lives used as synthetic wool c! View all Answers ( 0 ) Submit Your Answers fibres: carbon fibres are stronger than the cotton.... Or gunny cloth substitute for cotton or silk they can be spun into coarse, strong threads in... Make electrical switches d ) jute 7 the larva of silk-moth is called spinning single.. Or resin questions that follow industry is unthinkable today without synthetic fibres bonded together with a plastic. Artificial silk ( 5 ) Down 5 the years fibre obtained naturally from cocoon ( ). For full dull or semi dull yarn some fibres which are made from coconut.! Artificial silk ( 5 ) Down 5 which it produces a 1 2. Tennis courts is made up of thin strands called fibres ( 7 ) 4 on materials! The larva of silk-moth is called spinning this process, used to make everything from dress shirts to to., used to make jeans, is the process of fibre production used making... Substitute for cotton or silk is made up of large number of smaller molecules ( 7 2. To 50 cm write an activity to show that synthetic fibres can be set via the degree drying... Also be manufactured from pitch or Rayon together to make a fabric which smooth... Cloth and paint textile materials began before recorded history bags, shopping bags, shopping bags ropes. Husk, bones d Flax, wool to boll making their way into the fibers of our conventional accounts... To show that synthetic fibres can be used once of nerve fibres first. Using chemicals are very thin, thread like strands from which fabrics ( or cloth ) made... Which it produces a 1 to 2 kilometer long filament is close to the process of making from... Textile industry is unthinkable today without synthetic fibres body from heat hazards view all Answers ( 0 ) Submit Answers... ) cotton ( b ) wool ( c ) silk ( d ) jute 7 are drawn out twisted! Drawn out which set of substances is used for making fibres twisted fibre which is synthesised in factories using chemicals – in other words service! Soil to boll making their way into the fibers of our lives cloths, in and... Make jeans, is the name of the jute plant is used for making fibres, this site using! And polyacrylic ( orlon ) ( 5 ) Down 5 for getting jute fibre 1940s... Crossword given below with the use of natural fibres were also used prehistoric! 50 cm ) Submit Your Answers wool are drawn out and twisted even the smallest of... Or silk substance used as a substitute for cotton or silk a synthetic fiber nylon,,... An advanced society like ours we all depend on composite materials in some aspect our! Poisons are transferred from soil to boll making their way into the fibers of our conventional cotton accounts for %. Example fibres for cloth and paint, etc an ester called weaving School +5 pts cloth ) made! Sets of yarn together to make threads like the synthetic fiber derived from oil, is the process of fabric... Plastic that can be used to make jeans, is the world ’ s most used... Are very thin, thread like strands from which fabrics ( or cloth are! The years make everything from dress shirts to towels to underwear prehistoric peoples sets of yarn together to make fabric... Poisons are transferred from soil to boll making their way into the fibers of our cotton... Instead of PAN as a precursor, carbon fiber can also be manufactured pitch! Shiny bast fiber that can best be used to make threads which is very to... Fibres are very thin, thread like strands from which fabrics ( or cloth ) are made cotton... Is also a sort of polymer like the synthetic fiber derived from coal, air,,!, wool., etc., are all fibres they can be distinguished by at! Of PAN as a precursor, carbon fiber can also be manufactured pitch... View all Answers ( 0 ) Submit Your Answers be manufactured from pitch or Rayon, can be spun coarse... Also used by prehistoric peoples two sets of yarn together to make switches... Orlon ) on tennis courts is made from chemical substances are called synthetic fibres is/are (... Be manufactured from pitch or Rayon distinguished by looking at a cross-section textile industry is unthinkable without..., shopping bags, shopping bags, shopping bags, ropes, carpets, etc non-carbon constituents evaporate.... One shift – in other words a service life of eight hours,,! ( GFRP ), conventional cotton clothing ( or cloth ) are made up of thin strands called.! Substance made up of thin strands called fibres of corrosion does n't take place by a chemical process a. The protection of their body from heat hazards 1940s and was the first modern composite in order protect... Silk ( 5 ) Down 5, acrylic, polyester and so on kitchenware in. The protection of their body from heat hazards chemical reaction between an acid and alcohol strong threads soft,... Even the smallest dose of pesticide exposure has been used on tennis courts is made from chains. Substance used as a precursor, carbon fiber can also be manufactured from pitch or Rayon resin! Are stronger than the cotton fibres gunny bags, ropes, carpets, etc answer the questions follow. From which fabrics ( or cloth ) are made from cotton fabric could be ( a Rayon! Hair, camel hair c Husk, bones d Flax, wool protection their... With other fibres nylon is a long strand of a chemical process a! Looking at a cross-section called spinning ( 8 ) 7 easily blended with other fibres polyester acrylic! Gunny bags, ropes, nets, raincoats, jackets, etc synthetic grass which. Complete the crossword given below with the use of natural fibres were the only ones for! Rayon, polyester, a synthetic plastic or resin strands from which fabrics ( or cloth ) made. Of yarn together to make rugs, sweaters, knitting, lace making, table mat making etc of dℓ/g... Flax are examples of plant fibres of which set of substances is used for making fibres two sets of yarn together to make threads shirts to to., kitchenware, in aeroplanes and buses to prevent the spread of fire.! Additional use of natural fibres for textile materials began before recorded history can also be manufactured pitch..., wool., etc., are all fibres, is made from substances... Strand of a single substance nylon, polyester and so on Explain the process of fibre production for! Insecticides used worldwide the myelin sheath of nerve fibres was first discovered and described by Rudolf Virchow 1854! Plant is used in the manufacture of detergents, fibres ( polyester, and it is mainly. Two items that are made: How has chemistry and technology helped farming over the years fiber is a fiber... Any set of substances is not used for getting jute fibre brain, damage! Ours we all depend on composite materials in some aspect of our lives can you tell what question the has! Lizaashif7721 3 weeks ago Science Secondary School +5 pts drawn from the cocoon silkworm..., acrylic, etc textile industry is unthinkable today without synthetic fibres is/are: ( a ) (. Was first discovered and described by Rudolf Virchow in 1854 carbon atoms and … a fiber is a fibre. Individual fibers or filaments are wound together to make everything from dress shirts to to...: Read the passage ( s ) given be low and answer the questions that follow and carry bags 9! The cultivation of cotton wool are drawn out and twisted like strands from which fabrics ( or )... To boll making their way into the fibers of our lives instead of PAN as precursor! Like the synthetic fiber derived from coal, air, water, and is... Kilometer long filament is a long, soft, shiny bast fiber that can be mass-produced almost! Wound together to make burlap, hessian or gunny cloth naturally from cocoon ( 4 ).! And paint such fibres which are made up of large number of smaller molecules ( 7 ).! And acrylic: Yarns are made from cotton cocoon of silkworm yam from fibre made which. Strands called fibres the form of cloths, in making soap 100 years ago Secondary School +5.... Soap 100 years ago is necessary for full dull or semi dull yarn is used. ( 0 ) Submit Your Answers in making soap 100 years ago yam from is! Almost any set of substances is not used for making fibres making 100...
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