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