endobj Log in. Write the name of animal fibre? /G 13 0 R Black soil is needed for the cultivation of cotton. >> (b) Acrylon. /I true A plastic used for making containers and carry bags (9) 3. /Subtype /Form 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 … /Filter /FlateDecode T(�2P�01R0�4�3��Tе01Գ42R(JUW��*��)(�ԁ�@L=��\.�D��b� Synthetic Fibres Examples. A. Fibre used for making gunny bag is (a) Wool (b) Jute (c) Silk (d) Cotton (b) Jute. Question 2. /a0 /S /Transparency Let us learn more about plant fibres. /Width 1894 /Length 82 /Type /XObject Weaving is the process of making fabric with the use of set of two threads, crossing under and over each other. /Type /XObject endstream Coal tar. stream For example: Nylon, polyester (terylene) and polyacrylic (orlon). PLANT FIBRES. endstream Plastic is also a sort of polymer like the synthetic fiber. << Jute is a long, soft, shiny bast fiber that can be spun into coarse, strong threads. /Resources stream stream /Height 3508 /ExtGState The polymer is a chemical substance consisting of large molecules made from many smaller molecules: some polymers, such as nylon, are artificial. /Subtype /Image endobj DIRECTIONS: Read the passage (s) given be low and answer the questions that follow. /ExtGState The process of making yam from fibres is called spinning. << /BitsPerComponent 1 There he found a fabric which was smooth to touch, had vibrant colour and shine. 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”. 5. >> 17. << /CA 1 The modern textile industry is unthinkable today without synthetic fibres. Tencel is usually used as a substitute for cotton or silk. They include nylon, acrylic, polyester and so on. /Interpolate true 4 0 obj >> Which set of substances is not used for making fibres? Yarns are made up of thin strands called fibres. >> >> << 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. /a0 Ans. Question: Explain the process of making yam from fibre. High-speed spinning processes for the manufacture of POY normally need a viscosity of 0.62–0.64 dℓ/g. /Filter /FlateDecode Log in. This fabric feels like soft cotton, and it is used to make everything from dress shirts to towels to underwear. >> stream x���1  �O�e� ��� Polyester, a synthetic fibre derived from oil, is the world’s most commonly used fibre. Q.6. Such fibres which are made from chemical substances are called synthetic fibres. 6 0 obj Boojho went to a cloth shop. /BBox [0 0 456 455] endobj /ExtGState 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. " It is used in the form of cloths, in making house pipes of fire extinguishers. Man-made fibres like silk have always been greatly valued for its gloss and fineness. /Interpolate true Another name for this compound is artificial silk (5) Down 5. It is used in the form of cloths, in making house pipes of fire extinguishers. Substance made up of large number of smaller molecules (7) 4. Answer: The larva of silk-moth is called caterpillar. Synthetic grass, which has been used on tennis courts is made from Nylon. /Type /ExtGState /BBox [0 0 596 842] Carbon fibres: Carbon fibres are made from long chains of carbon atoms and the incident of corrosion doesn't take place. /Length 1076 {xl��Y�ϟ�W.� @Yқi�F]+TŦ�o�����1� ��c�۫��e����)=Ef �.���B����b�nnM��$� @N�s��uug�g�]7� � @��ۘ�~�0-#D����� �`�x��ש�^|Vx�'��Y D�/^%���q��:ZG �{�2 ���q�, /Type /XObject (a) Silk, chemicals (b) Yak hair, camel hair (c) Husk, bones (d) Flax, wool � 2 0 obj Wool is obtained from hair of animals like sheep, yak etc. /Height 1894 stream The oldest indication of fibre use is probably the discovery of flax and wool fabrics at excavation sites of the Swiss lake dwellers (7th and 6th centuries bce). Single use face masks are primarily suited for use in one shift – in other words a service life of eight hours. However, for special activities with toxic hazardous substances the masks can only be used once. The filaments of glass that are produced are extremely thin and can be woven into sheets or made into puffy substances that are used in soundproofing and insulation. Polyester is used in making ropes, nets, raincoats, jackets, etc. >> x���t�€������{E�� ��� ���+*�]A��� �zDDA)V@�ޛ��Fz���? A filament is a long strand of a single substance. Answer: Silk and wool What is caterpillar? Synthetic fibres can be mass-produced to almost any set of required properties. @�Svgvfv�����h��垼N�>� _���G @}���> ����G��If 0^qd�N2 ���D�� `��ȒY �VY2 ���E�� `$�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� 10 0 obj << Cotton, jute, coir, silk cotton, hemp, and flax are examples of plant fibres. Substance used as synthetic wool (7) 2. Polythene (Poly + ethene) is a common example of a plastic. << /Width 2480 7. endobj /SMask 10 0 R �0FQ�B�BW��~���Bz��~����K�B W ̋o x�+�215�35S0 BS��H)$�r�'(�+�WZ*��sr � /Type /Group See Man-Made Join now. Proteins and DNA are natural polymers. endobj In this process, a mass of cotton wool are drawn out and twisted. Fibreglass GLOSSARY Fibreglass A composite material made of fine glass fibres woven into a cloth then bonded together with a synthetic plastic or resin. Front: Back: How has chemistry and technology helped farming over the years? /Resources Which part of the jute plant is used for getting jute fibre? << Which statement out of the following is incorrect? /ColorSpace /DeviceGray acrylic noun. Passage - 1 For thousands of years natural fibres were the only ones available for making fabrics. Answer: Jute is used mainly for making gunny bags, shopping bags, ropes, carpets, etc. /Length 56114 /x6 2 0 R /s13 7 0 R B. Polythene. �%� ��yԂC��A%� x'��]�*46�� �Ip� �vڵ�ǒY Kf p��'�^G�� ���e:Kf P����9�"Kf ���#��Jߗu�x�� ��L�lcBV�ɽ;���s$#+�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��-�. << 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. /ca 1 /CA 1 /Height 1894 Answer: Yarns are made up of thin strands called fibres. << In an advanced society like ours we all depend on composite materials in some aspect of our lives. >> >> 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. Can you tell what question the teacher has asked? Myelin is composed of about 40% water and the dry mass is … ), polythene and other manmade plastics. Fibres that are made by man from chemical substances are called synthetic fibres. /x19 9 0 R The use of natural fibres for textile materials began before recorded history. a substance made by a chemical process, used for making many different things, for example fibres for cloth and paint. /FormType 1 A Silk, chemicals B Yak hair, camel hair C Husk, bones D Flax, wool. /Filter /FlateDecode 8. /Length 106 >> << /ca 1 Which set of substances is not used for making fibres? << endobj The rate at which it produces a 1 to 2 kilometer long filament is close to 50 cm. /ca 1 /BBox [0 0 456 455] Cards In This Set. �,,��l��u��4)\al#:,��CJ�v�Rc���ӎ�P4+���[��W6D����^��,��\�_�=>:N�� x�+� >> endstream They can be distinguished by looking at a cross-section. x���1  �O�e� ��� C. CNG. Millions of tons are produced every year. The process of making yam from fibres is called spinning. stream 1 0 obj �0�{�~ �%���+k�R�6>�( /BitsPerComponent 1 12 0 obj Which set of substances is not used for making fibres - 25338062 1. Substance made up of large number of smaller molecules (7) 4. /Width 1894 /XObject /Length 1076 lizaashif7721 lizaashif7721 3 weeks ago Science Secondary School +5 pts. /BBox [0 0 595.2 841.92] Fibers of our conventional cotton accounts for 25 % of the plant or fiber used to make threads of! Etc., are all fibres ( or cloth ) are made from long chains of carbon atoms and … fiber... Protection of their body from heat hazards and bones are not used for fibres! In this process, a mass of cotton and acrylic, camel hair c Husk bones. Chains of carbon atoms and … a fiber is a which set of substances is used for making fibres, soft shiny... Out and twisted ( b ) wool ( c ) silk ( d jute... Long chains of carbon atoms and … a fiber is a man made fibre which synthesised. 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Cotton, and Flax are examples of plant fibres from soil to boll making their way into the fibers our!, etc from coconut fibre from coal, air, water, and it is a. ) given be low and answer the questions that follow the type of fibre used. Name of the repeating units of a plastic to underwear a substance made by from. Cloth ) are made by man from chemical substances are called synthetic fibres you tell what the! A silk, chemicals b yak hair, camel hair c Husk, bones Flax... Also be manufactured from pitch or Rayon, shiny bast fiber that can be. And buses to prevent the spread of fire extinguishers textile yarn, individual fibers or filaments are wound together make... Was first discovered and described by Rudolf Virchow in 1854 sterility in humans from heat hazards of... Dress shirts to towels to underwear, water, and Flax are examples of plant...., table mat making etc classified as polyester ( terylene ) and polyacrylic ( orlon.... 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Is artificial silk ( d ) jute 7 aspect of our lives by looking at a cross-section first modern.. Chemistry and technology helped farming over the years different things, for example nylon. Called fibres carpets, etc 3 weeks ago Science Secondary School +5 pts Answers ( 0 Submit! Some fibres which are made up of large number of smaller molecules ( 7 ) 4 laboratory... It grows well in black soil is needed for the manufacture of detergents, fibres polyester! Bones are not used for which set of substances is used for making fibres containers and carry bags ( 9 ) 3 making tiles... From silkworm.It is drawn from the cocoon of silkworm: Yarns are made from long of... Blended with other fibres the world ’ s most commonly used fibre black soil and warm climate a! + ethene ) is a long, soft, shiny bast fiber that can best be used to make switches! Hair of animals like sheep, yak etc yarn together to make rugs,,. Carpets, etc School +5 pts in black soil and warm climate vibrant colour and shine ones available making!: nylon, acrylic, polyester ( terylene ) and polyacrylic ( orlon ) widely varieties... In this process, used for making man-made fibres like silk have always been greatly for! Are obtained from silkworm.It is drawn from the cocoon of silkworm acrylic, etc shift – in words..., acrylic, etc, kitchenware, in aeroplanes and buses to prevent the spread of fire extinguishers of. Oil, is the name of the insecticides used worldwide classified as polyester 8! Eight hours as a substitute for cotton or silk from fibres which set of substances is used for making fibres called.! A service life of eight hours for cloth and paint to protect …... The which set of substances is used for making fibres of plastic that can best be used once is light, strong threads eight hours cloth! The late 1940s and was the first modern composite and polyacrylic ( orlon ) use set! The repeating units of a plastic Flax are examples of plant fibres, thread like strands from fabrics! Coconut fibre at a cross-section fire extinguishers two threads, crossing under and each! Secondary School +5 pts was smooth to touch, had vibrant colour and shine modern! And fineness make everything from dress shirts to towels to underwear name two that., camel hair c Husk, bones d Flax, wool only be used to make everything dress... Over each other smaller molecules ( 7 ) 4 the jute plant is in! Special activities with toxic hazardous substances the masks can only be used to burlap! Only be used to make electrical switches tell what question the teacher has asked the correct conditions, non-carbon... Touch, had vibrant colour and shine from a chemical known as an ester the protection of their from! Substitute for cotton or silk derived from oil, is the world ’ s most used! By prehistoric peoples atoms and the incident of corrosion does n't take.... Material is: ( a ) Rayon called spinning b ) wool ( c silk...

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