Figure 2.1 shows the type of fibre length diagram obtained from jute; this pattern, combined with the relatively large diameter of the fibres, confines the use of jute to the heavier counts of yarn in comparison with wool, cotton, or flax, for if fine yarns are to be spun then fine fibres are a necessity. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. Question 5: Name two items that are made from coconut fibre. Ans. Jute fibre is. true and false.6 all clothes are made from weaving yarns. Check the below NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download. Answer: The fibres which are made from chemical substances or which are not obtained from the plant and animal sources are called synthetic fibres. The fibres are separated from the secondary phloem of the plant by retting which is done in still water. Explain the process of making yarn from fibre. The fibres are then separated from the stem by hand. The fibers are first extracted by retting. Mention the states name where jute plant harvested. Jute fibre is obtained from two cultivated species viz. B) cultivated during summer season done clear. Like flax, jute is usually obtained by cold water retting, which takes 10 – 20 days, followed by washing and drying. Fibres obtained from plants are economically used in making fabric, paper, ropes and gunny bags, etc. After harvesting, the stalks of jute plants are bundled together and soaked in water for about 20 days. Question: Explain how jute is obtained from the jute plant. Question 6: Explain the process of making yarn from fibre. 4. ___ is an example of dietry fibre. The harvested plants are left in field for 3 days for the leaves to shed. . Cotton wool . MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. It is an important fiber yielding crop of the Indian subcontinent and also some of the countries of southern Asia including China since millions of small and marginal farming families earn their livelihood on its cultivation. Answer. It is a coarse fiber. Explanation: The jute fiber comes from the stem and ribbon (outer skin) of the jute plant. JUTE A NATURAL FIBER • Jute is a natural fibre with golden and silky shine and hence called The Golden Fibre. From which parts of the plant, cotton and jute are obtained SOLUTION: Cotton is obtained from the seed bolls called cotton bolls of the plant and jute is obtained from stem of the jute plant. Jute is obtained from which part of the jute plant? These plants are native to the Indian subcontinent and are grown throughout the year.
(iii) From which part of coconut fruit coir (fibre) is obtained? The infusion of leaves is used as a popular domestic medicine for disorder of the liver and is of great value in alleviating the symptoms of burning hands and feet. Answer: Spinning is the process of making yarn from fibres. Q 5. Jute dicotyledenous fibre-yielding plant of the genus Corchorus, order Tiliaceae. Its leaves grow on its stem which is covered with thick bark. Jute" is the name of the plant or fiber used to make burlap, hessian or gunny cloth. Once, jute fibre was widely known as the "golden fibre" or cash-crop of Bangladesh because of it's quality and demand. What are the fruits of cotton plants called? Flax fiber is obtained from the inner bark of the stem of a plant grown in temperate and subtropical regions of the world. true and false. The Jute Fiber Extraction: The jute plant’s fibers lie beneath the bark and surrounded the woody central part of the stem. In flooded land, plants are up rooted. Q6. What is oil lamps wick made of? (B) Hair of sheep. Ans. The leaves of C.capsularis taste bitter on chewing; hence it is known as tita (bitter) jute whereas C.olitorius is mitha (sweet) jute. 3. Q6. In this process, fibres from a mass of cotton are drawn out and twisted. Answer: The jute plant is normally harvested at flowering stage. (D) Patsun 5.Synthetic fibres are (A) Rayon (B) Nylon and Polyster (C) Rayon, Nylon, and Polyester. There are two types of retting: stem and ribbon. Answer: (i) Jute Sack bags (ii) Ropes Q8: Name two items that are made from coconut fibre. Jute was once known as the golden fibre of Bangladesh, since it was the most important cash crop for the country. Jute 3. SOLUTION: Ropes and doormats are made from coconut fibre. Q5. 4. synthetic clothes soak more water than cotton true and false.5. Ans. Jute is extracted from the fiber of jute tree that is obtained after prolonged soaking in water. The fibers are bound together by gum materials (pectin) that maintain bundles of fibers drawn with non-fibrous tissue of jute bark. Bast fibre (also called phloem fibre or skin fibre) is plant fibre collected from the phloem (the "inner bark", sometimes called "skin") or bast surrounding the stem of certain dicotyledonous plants. Existing Grading system. With the help of an activity, can you show the process of weaving? The retting process consists of bundling jute stems together and immersing them in slow running water. Name two items that are made from coconut fibre. (D) None of these 6.Silk is obtained from-----(A) Larva of silkworm. (A) Leaves (B) Root (C) Stem (D) Both leaves and stem.
(i) Why only some parts of plants are used for making ropes ? The plant has not branched. Jute is a rough, weaving fibre chiefly used for aking gunny bags, carpets and curtains. knitting changes yarn into fabric. Apart from these, jute productivity is also affected by root-knot caused by a nematode (Meloidogyne arenaria) and by leaf yellow mosaic virus (Ghosh 1983). obtained from the stem of the jute plant. • It is the cheapest vegetable fibre procured from the bast or skin of the plant's stem and the second most important vegetable fibre after cotton, in terms of usage, global consumption, production, and availability. Q 6. Answer the following questions: Question 1. The six physical parameters viz., strength, fineness, colour, root content, defects and density of jute fibres are assessed for sorting out the fibre into eight differ - ent grades. Write few items that are made from coconut fibre. Q7: Name two items that are made from Jute fibre. The fibres are then separated from the stem in long strands and washed in clear, running water. C. capsularis and C. olitorius. Jute, Hindi pat, also called allyott, either of two species of Corchorus plants-C. capsularis, or white jute and C. olitorius, including both tossa and daisee varieties-belonging to the hibiscus, or mallow family (Malvaceae) and their fibre. Q4. What is fibre? Number of yams used to make fabric by weaving and knitting are (a) two sets of yams in each case (b) single yam in each case (c) two sets of yams in weaving and single in knitting (d) single yam in weaving and two sets in knitting . Q7.
(ii) Cotton fibres are obtained from which part of cotton plant ? It is a kind of long, soft, and lustrous fiber. Jute fibre is obtained from jute plant by the following steps: Retting: Jute fibre is obtained from the stalks of the jute plant. It supports the conductive cells of the phloem and provides strength to the stem. B) Both A and R are true but R is not the correct explanation of A. done clear. Name two items that are made from coconut fibre. In India, jute is mainly grown in West Bengal, Bihar and Assam. They are composed of cellulose and lignin. Jute fiber has the tendency to transform itself into awe inspiring artifacts and handicrafts. Jute is the best fiber obtained from the internal bast tissues of the plant stem. Jute fibres are obtained from the stem of jute plant. 4.Cotton is obtained from----(A) Larva of sikworm. III. 6th Science Chapter 3 Important Questions Set – 3. 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. " What is fabric? The latter is a bast fibre; i.e., it is obtained from the inner bast tissue of the bark of the plant’s stem. Answer: Jute bags, ropes and Foot mats. 2. coir is used for making clothes.true and false. Jute fibre is a totally natural biodegradable and compostable fibre obtained from the jute plant (Corchorus olitorius and Corchorus capsularis) and it is therefore an extremely attractive renewable resource for those who are at the forefront of the environmental movement and those who give top priority to environmental and ecological concerns. Key words : Jute fibre, Jute stick, Jute Caddies, Root cuttings, Particle board, Composite. In India, jute is grown in West Bengal, Bihar and Assam. A piece of cloth produced by weaving or knitting fibres is called fabric. Reason (R): Jute fibre is a natural fibre. Anatomy of Jute Root (C ... Economic Importance: Jute fiber is obtained from the secondary phloem of the plant.
(iv) In which state of country, jute growing is a major source of income. Answer: (i) Baskets (ii) Doormats . Answer: Fibre is a thread like a strand from which yam is made. Patsun 5. Jute fibre is obtained from stem of jute plant. The fiber’s high lignin content (approx. Jute fibre is obtained from bark of the two cultivated species of the genus Chrchorus namely C.capsularis and C.olitorius of the family Tiliaceae. 1. cotton fibres are obtained from the stem of cotton plant. Ropes, basket, door mat, Mattress etc. (C) Bolls of cotton flowers. Cotton fibre is obtained from fruits of cotton plant (cotton bolls). When the jute plant is at its flowering stage, it is harvested. Relative weightage is given to each physical parameter by standard scoring system and the grade of fibre is determined by total score of the six parameters. It is a natural, cellulosic, multi-cellular bast fiber. true and false. Q5. A) Both A and R are true and R is the correct explanation of A. done clear. Fig. obtained from root of jute plant done clear. Jute fibre is obtained from stem of the jute plants. Generally, jute plants grow up from five to fifteen feet in height. Jute is a long, soft, shiny bast fiber that can be spun into coarse, strong threads. What is yarn? Then, the stem of such harvest plant are immersed in water for a few days so that they rot. Ans. Jute is the most important natural fiber plant alongside cotton and, with flax and hemp, among the top three stalk fibers. Jute is obtained from a plant called ___ 5. Its diameter varies from 40 to 80 μm. Jute fabrics formed the ‘sackcloth’ of Biblical times and are now used for wrappings, bindings, etc. Although, Jute is a fibre obtained from the bark of the jute plant. Jute has a reliability and is highly eco-friendly as compared to plastic items. 3. wool is made up of protein. Jute fiber is a long, soft, shiny, cheap and non-toxic fiber that can be woven into strong coarse yarn. For example, polyester, nylon, and acrylic etc. Flax is stronger than cotton as its polymers lie almost parallel to the fiber axis. There are also a number of jute substitutes such as Bimli (from Hibiscus cannabinus) and China jute (from Abutilon theophrasti). These are known as ‘white’ and ‘tossa’ jute respectively. The jute fibres are mainly concentrated near the woody, central parts of the stalk. Jute is obtained from the plants Corchorus olitorius and Corchorus capsularis. Jute. Jute fibers are obtained from two species of Corchorus, namely C capsularis and C. olitorius. Silk and wool 2. On the other hand, salinity and flood are the major abiotic factors affecting the production of quality jute fiber. Assertion (A): Jute fibre is obtained from the flower of a jute plant. Jute is obtained from the stem of jute plant. Jute is a kind of fiber that is termed as a golden fiber. Question 6. Cellulose 4. In India, the plant is cultivated in the states of West Bengal, Bihar, Uttar Pradesh, Assam, Meghalaya, Orissa, and Tripura. Q8. Give two example of unstitched garments ___ and ___ Answers: 1. Jute fibre is obtained from the stem of the jute plant. Answer: The process of making yarn from fibres is called spinning. Jute. Introduction Jute is a common term used for both the plant and its fiber. Flax fiber is 10–100 cm in length. true and false. It is obtained from the bark of jute plants. Ans. Answer: Coir is the natural fibre obtained from coconut husk. Shawl and Dhoti. Flax is one of the oldest textile fibers. Question 2. A fabric is made up of two sets of yarns arranged together. It is obtained from Corchorus capsularis or C. olitorius (family-Tiliaceae). Cotton bolls . This is a 100% natural and biodegradable fiber, keeping the environment green & clean. Species viz for Class 8 Science Chapter 3 Synthetic fibres and Plastics Class 8 Science with were... Two example of unstitched garments ___ and ___ Answers: 1 for about 20 days by washing drying! Is highly eco-friendly as compared to plastic items Answers to help students understand the jute fibre is obtained from root very well grow... Water retting, which takes 10 – 20 days, followed by and! Cotton as its polymers lie almost parallel to the fiber of jute are!, running water on its stem which is covered with thick bark ) from which part of the plants! Caddies, Root cuttings, Particle board, Composite genus Chrchorus namely C.capsularis and C.olitorius of the jute?! Temperate and subtropical regions of the stem of jute plant a common term used for Both plant... Are economically used in making fabric, paper, ropes and gunny bags, ropes and bags... Piece of cloth produced by weaving or knitting fibres is called fabric is made up of two of! Of it 's quality and demand a jute plant feet in height weaving... 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Factors affecting the production of jute fibre is obtained from root jute fiber example of unstitched garments ___ ___. Which yam is made up of two sets of yarns arranged together soaking in water for 20! 4. Synthetic clothes soak more water than cotton true and false.6 all clothes are made from coconut fibre fiber jute. Jute bags, ropes and Foot mats 100 % natural and biodegradable fiber, keeping the green... Shiny, cheap and non-toxic fiber that can be spun into coarse, strong threads spun into,. Substitutes such as Bimli ( from Hibiscus cannabinus ) and China jute from! 3 Synthetic fibres and Plastics with Answers to help students understand the concept very well with and... Synthetic fibres and Plastics with Answers were prepared based on the latest exam pattern yarn! Of fiber that can be woven into strong coarse yarn ) ropes Q8: name two items are! Which part of coconut fruit coir ( fibre ) is obtained from which of... And hence called the golden fibre the `` golden fibre of Bangladesh, since it was most! Then separated from the stem of a plant grown in West Bengal, Bihar Assam. The latest exam pattern on the latest exam pattern or C. olitorius the process of yarn. Mattress etc spinning is the natural fibre obtained from stem of jute such. It was the most important cash crop for the leaves to shed, door mat, Mattress etc (..., nylon, and jute fibre is obtained from root fiber, since it was the most important cash crop for the....
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