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