Introduction Jute is a common term used for both the plant and its fiber. Jute" is the name of the plant or fiber used to make burlap, hessian or gunny cloth. Cotton fibre is obtained from fruits of cotton plant (cotton bolls). The latter is a bast fibre; i.e., it is obtained from the inner bast tissue of the bark of the plant’s stem. Jute fiber has the tendency to transform itself into awe inspiring artifacts and handicrafts. Ans. Existing Grading system. (B) Hair of sheep. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. What is oil lamps wick made of? Ans. SOLUTION: Ropes and doormats are made from coconut fibre. Answer the following questions: Question 1. Assertion (A): Jute fibre is obtained from the flower of a jute plant. 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. In this process, fibres from a mass of cotton are drawn out and twisted. There are also a number of jute substitutes such as Bimli (from Hibiscus cannabinus) and China jute (from Abutilon theophrasti). 6th Science Chapter 3 Important Questions Set – 3. 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. Name two items that are made from coconut fibre. Answer. obtained from root of jute plant done clear. A fabric is made up of two sets of yarns arranged together. It is obtained from the bark of jute plants. obtained from the stem of the jute plant. What is fabric? Answer: (i) Jute Sack bags (ii) Ropes Q8: Name two items that are made from coconut fibre. It is a natural, cellulosic, multi-cellular bast fiber. Jute fibre is obtained from stem of the jute plants. Jute fibre is obtained from two cultivated species viz. 3. wool is made up of protein. It is obtained from Corchorus capsularis or C. olitorius (family-Tiliaceae). It supports the conductive cells of the phloem and provides strength to the stem. true and false.6 all clothes are made from weaving yarns. Jute 3. The harvested plants are left in field for 3 days for the leaves to shed. For example, polyester, nylon, and acrylic etc. true and false. What is yarn? Check the below NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download. Answer: (i) Baskets (ii) Doormats . In India, jute is mainly grown in West Bengal, Bihar and Assam. (D) Patsun 5.Synthetic fibres are (A) Rayon (B) Nylon and Polyster (C) Rayon, Nylon, and Polyester. Jute is obtained from a plant called ___ 5. In India, the plant is cultivated in the states of West Bengal, Bihar, Uttar Pradesh, Assam, Meghalaya, Orissa, and Tripura. Key words : Jute fibre, Jute stick, Jute Caddies, Root cuttings, Particle board, Composite. Its diameter varies from 40 to 80 μm. true and false. Cotton bolls . The plant has not branched. Jute fiber is a long, soft, shiny, cheap and non-toxic fiber that can be woven into strong coarse yarn. 1. cotton fibres are obtained from the stem of cotton plant. This is a 100% natural and biodegradable fiber, keeping the environment green & clean. (C) Bolls of cotton flowers. Jute fabrics formed the ‘sackcloth’ of Biblical times and are now used for wrappings, bindings, etc. Q5. Generally, jute plants grow up from five to fifteen feet in height. Flax is stronger than cotton as its polymers lie almost parallel to the fiber axis. . Ans. Answer: Spinning is the process of making yarn from fibres. Answer: The process of making yarn from fibres is called spinning. Its leaves grow on its stem which is covered with thick bark. Answer: Coir is the natural fibre obtained from coconut husk. Then, the stem of such harvest plant are immersed in water for a few days so that they rot. Jute dicotyledenous fibre-yielding plant of the genus Corchorus, order Tiliaceae. • 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. Cellulose 4. Jute. A piece of cloth produced by weaving or knitting fibres is called fabric. Q6. Question 6. Question 2. Jute is obtained from the plants Corchorus olitorius and Corchorus capsularis. The retting process consists of bundling jute stems together and immersing them in slow running water. Jute fibre is. It is a coarse fiber. The fibres are separated from the secondary phloem of the plant by retting which is done in still water. Flax fiber is 10–100 cm in length. Write few 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. It is a kind of long, soft, and lustrous fiber. Give two example of unstitched garments ___ and ___ Answers: 1. Q7: Name two items that are made from Jute fibre. Q 5. They are composed of cellulose and lignin. 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. Ans. Shawl and Dhoti. The fiber’s high lignin content (approx. true and false. III. Jute has a reliability and is highly eco-friendly as compared to plastic items. Although, Jute is a fibre obtained from the bark of the jute plant. 4.Cotton is obtained from----(A) Larva of sikworm. JUTE A NATURAL FIBER • Jute is a natural fibre with golden and silky shine and hence called The Golden Fibre. In India, jute is grown in West Bengal, Bihar and Assam. These plants are native to the Indian subcontinent and are grown throughout the year. Q8. 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. Jute is a long, soft, shiny bast fiber that can be spun into coarse, strong threads. 2. coir is used for making clothes.true and false. Ans. Q 6. The jute fibres are mainly concentrated near the woody, central parts of the stalk. Reason (R): Jute fibre is a natural fibre. Q6. The Jute Fiber Extraction: The jute plant’s fibers lie beneath the bark and surrounded the woody central part of the stem. Jute is a kind of fiber that is termed as a golden fiber. The fibres are then separated from the stem in long strands and washed in clear, running water. Jute is extracted from the fiber of jute tree that is obtained after prolonged soaking in water. 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). (D) None of these 6.Silk is obtained from-----(A) Larva of silkworm. Once, jute fibre was widely known as the "golden fibre" or cash-crop of Bangladesh because of it's quality and demand. 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. " Answer: The jute plant is normally harvested at flowering stage. In flooded land, plants are up rooted. Like flax, jute is usually obtained by cold water retting, which takes 10 – 20 days, followed by washing and drying. Name two items that are made from coconut fibre. With the help of an activity, can you show the process of weaving? What are the fruits of cotton plants called? Fibres obtained from plants are economically used in making fabric, paper, ropes and gunny bags, etc. Jute is the best fiber obtained from the internal bast tissues of the plant stem.
(i) Why only some parts of plants are used for making ropes ? Silk and wool 2. 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 . Jute is the most important natural fiber plant alongside cotton and, with flax and hemp, among the top three stalk fibers. Question 6: Explain the process of making yarn from fibre. Question 5: Name two items that are made from coconut fibre. 3. 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. C. capsularis and C. olitorius. Fig. Jute fibers are obtained from two species of Corchorus, namely C capsularis and C. olitorius. Jute fibres are obtained from the stem of jute plant. What is fibre? After harvesting, the stalks of jute plants are bundled together and soaked in water for about 20 days. Q7. Anatomy of Jute Root (C ... Economic Importance: Jute fiber is obtained from the secondary phloem of the plant. 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. 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.
(iii) From which part of coconut fruit coir (fibre) is obtained? Jute fibre is obtained from the stem of the jute plant. knitting changes yarn into fabric. B) Both A and R are true but R is not the correct explanation of A. done clear. (A) Leaves (B) Root (C) Stem (D) Both leaves and stem. There are two types of retting: stem and ribbon. Jute is obtained from the stem of jute plant. On the other hand, salinity and flood are the major abiotic factors affecting the production of quality jute fiber. Question: Explain how jute is obtained from the jute plant. Flax fiber is obtained from the inner bark of the stem of a plant grown in temperate and subtropical regions of the world. Q5. When the jute plant is at its flowering stage, it is harvested. Mention the states name where jute plant harvested. Explain the process of making yarn from fibre. Q4. Flax is one of the oldest textile fibers. Cotton wool . Answer: Jute bags, ropes and Foot mats. The fibers are first extracted by retting.
(ii) Cotton fibres are obtained from which part of cotton plant ? 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. The fibres are then separated from the stem by hand. Patsun 5. The fibers are bound together by gum materials (pectin) that maintain bundles of fibers drawn with non-fibrous tissue of jute bark. ___ is an example of dietry fibre. Explanation: The jute fiber comes from the stem and ribbon (outer skin) of the jute plant. Answer: Fibre is a thread like a strand from which yam is made. Jute is obtained from which part of the jute plant? The leaves of C.capsularis taste bitter on chewing; hence it is known as tita (bitter) jute whereas C.olitorius is mitha (sweet) jute.
(iv) In which state of country, jute growing is a major source of income. 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. 4. synthetic clothes soak more water than cotton true and false.5. Jute. Ropes, basket, door mat, Mattress etc. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. 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. Jute is a rough, weaving fibre chiefly used for aking gunny bags, carpets and curtains. 4. 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