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