View the step-by-step solution to: Question 35. Information from its description page there is … Figure 4.5 shows a typical fiber shape for a commercial viscose rayon fiber product with a 1.5-denier fineness and 1.5-in (38 mm) length. The cross-section resembles a distorted circle with a serrated contour and the fiber surface is smooth but striated longitudinally, as shown in Figure 4.6. You need to be an expert to edit code. In transverse sections they show an irregularly crenate margin. Rubbing small amount of liquid detergent and let it sit for 5 min will be a good option. Source: Решение Совета депутатов муниципального образования «Хоринский район» от 17.04.2015 № 3-17/15 «О флаге муниципального образования „Хоринский район“ Республики Бурятия» Author • Like Cellulose wadding, Viscose rayon is also composed almost entirely of cellulose. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. (a) Non-reactive (c) Durable (b) Light in weight (d) Good conductor of electricity 8. You have entered an incorrect email address! For centuries humankind has relied upon various plants and animals to provide the raw materials for fabrics and clothing. Strong alkalis expands the fiber and also weaken the tenacity. Select one or more: a) large amounts of polluting effluent are usually produced b) the molecular weight of the cellulose will be reduced c) cellulose must be removed from wood pulp or some other source d) the cellulose must be dissolved in a solvent to be extruded. However, in the last century scientists have turned to chemistry and technology to create and enhance many of the fabrics we now take for granted. Which of the following is not a natural fibre (a) Silk (b) Jute (c) Coir (d) Rayon toppr. Programmers can alter a closed source code based on their interests and goals. Here manufacturing process of rayon fabric is discussed. This initial product needed improvements, and it wasn’t until 1924 that it was officially named “rayon.” Rayon is made … Rayon is obtained by the chemical treatment of wool pulp (which contains cellulose). Q. Rayon has properties similar to silk and is therefore called artificial or synthetic fibre. (b) Rayon (d) Terylene 6. 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Which of the following is an advantage of 'open source' software? Answered By . Anyone can obtain the source code for a closed source project. The tenacity of rayon weakens in diluted acids at high temperatures as well as in concentrated acids at cold temperatures, and it would soften. A viscous solution of cellulose; A synonym of rayon; A specific term for viscose rayon — rayon made using the viscose process There are two main categories of man-made fibers: those that are made from natural products (cellulos… Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. Fibers in this pH range are considered to be “skin-friendly”. It is something that’s been used for centuries, and it is particularly fast growing. Rayon is a regenerated cellulose fiber that is made from natural sources of cellulose, such as wood and related agricultural products. Cellulose. Description Coat of Arms of Uchaly rayon (Bashkortostan).png Rayon, artificial textile material composed of regenerated and purified cellulose derived from plant sources. Silkworms, sheep, beaver, buffalo deer, and even palm leaves are just some of the natural resources that have been used to meet these needs. This preview shows page 18 - 21 out of 21 pages.. 22. You can edit the source code to customise it. It is soluble in CUOXAM and 60 percent cold sulphuric acid, but insoluble in 5 percent boiling potassium hydroxide solution. In 1955, manufacturers began to produce a new type of rayon—high-wet-modulus (HWM) rayon—which was stronger and could be used to make sheets, towels, and apparel. Can sometimes be too generic for specialist purposes. Viscose rayon gives cellulose test with N /50 iodine solution and 80 percent sulphuric acid (blue colour). Cloudflare Ray ID: 5ff807349e810c21 Lint, gauze. It has the same molecular structure as cellulose. Name some artificial fibres. Name a natural fibre. Depending on the means used to bring the cellulose into solution to prepare the rayon fibres, Rayons are variously named such as acetate rayon, viscose rayon, cuprammonium rayon, nitrate rayon, etc. Rayon is a fabric that was first developed in France in 1884 to offer a cheaper alternative to silk textiles, explains Textile Fabric Consultants, Inc. A. increase in accounts receivable B. decrease in notes payable C. decrease in common stock D. increase in accounts payable E. increase in inventory Refer to section 3.1 AACSB: N/A Bloom's: Knowledge B. decrease in notes payable C. decrease in common stock D. It is then dissolved and forced through a spinneret to produce filaments which are chemically solidified, resulting in synthetic fibers of nearly pure cellulose. Tags: Question 7 . The pH of rayon is in the 5-6 range which indicates mild acidity. The creation of HWM rayon is considered the most important development in rayon production since its invention in the 1880s. ‘The fourth fiber, viscous rayon, remains in use today.’ ‘It is usually spun into fibers as rayon, but it is also cast in films as cellophane.’ ‘The material is made by heating synthetic fibers, such as rayon, until charred.’ ‘With a few notable exceptions such as rayon, most synthetic fibers come from petrochemicals.’ Save my name, email, and website in this browser for the next time I comment. Wool; PET; Wood pulp; Silk; Answer. Which one of the following is a source of cash? The correct option is C. Another way to prevent getting this page in the future is to use Privacy Pass. Suggest other answer Login to Discuss/suggest the answer... lattu singh 290 Exam: SOLVED PAPER SSC CHSL 2015 CONDUCTED ON 20 12 2015 Evening SHIFT Login to Discuss Login. You may need to download version 2.0 now from the Chrome Web Store. However, it is not completely a natural fabric, because this cellulose requires an extensive processing. Firstly depending on the source of the cellulose fibre there can be issues associated with the use of farming land or cleaning of old growth forests to plant crops to be utilised for rayon … Answer: Nylon, terylene, PET, acrylic, teflon, etc. Rayon, artificial textile material, composed of cellulose obtained from cotton linters or from the pulp of trees such as spruce. 71: Regenerated fibres. A, Cellulose wadding; B, Viscose rayon. This is why rayon is sometimes called viscose rayon. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. Rayon is a specific type of man-made fabric that, due to its manufacturing process, is technically considered a semi-synthetic fabric. Production In commercial use, rayon is considered as one of the most peculiar fabrics for the designing of textiles. If you’ve been following the definitions closely – you’d see that these are both quite interchangeable, especially if they go in combination with Bamboo. Rayons are prepared from the polysaccharide cellulose molecules derived from wood pulps by maceration and treatment with various chemical substances. Viscose rayon fiber used in the textile and apparel industries can be staple fiber or multifilament fiber. Which of the following is used as raw material for the manufacture of rayon ? In other words, there isn’t a substantial difference in the choice between rayon and viscose. Coat_of_Arms_of_Burzyan_rayon_(Bashkortostan).png ‎ (174 × 220 pixels, file size: 8 KB, MIME type: image/png) This is a file from the Wikimedia Commons . • Which of the following statements is true about closed source projects? Please enable Cookies and reload the page. Rayon is manufactured regenerated cellulose fibre (wood pulp). Answer: Cotton Question 2. The fibres are solid and transparent, and have a diameter ranging from 15 to 25 um their surface is finely grooved by longitudinal lines. Rayon is (A) natural silk (B) artificial silk (C) natural plastic or rubber (D) synthetic plastic. Fig. Name the basic component of animal fibres. Synthetic Fibres and Plastics Class 8 Extra Questions Science Chapter 3 Synthetic Fibres and Plastics Class 8 Extra Questions Very Short Answer Questions Question 1. Biological source: Rayons are prepared from the polysaccharide cellulose molecules derived from wood pulps by maceration and treatment with various chemical substances. Cellulose is treated with cold NaOH solution to purify it and then treated with carbon disulphide to form a viscous solution. SURVEY . Because it is produced from naturally occurring polymers and also chemically processed, it is neither a truly synthetic fibre nor a … Notify me of follow-up comments by email. This will weaken and damage the fabric. Check Answer and Solution for above question from Chemistry in Chemistry in Everyday Life - Tardigrade out of these viscose rayon is mainly used for surgical dressing purposes. Click here to get an answer to your question ️ which of the following is a source of rayon?A.wool B. woodpulp C. PET D. silk Viscose rayon occurs in fibres, which are white and highly lustrous. answr. Rayon is a manufactured regenerated cellulose fiber. Upvote(0) How satisfied are you with the answer? Only trusted programmers are allowed to make changes to a closed source project. answer choices . Which of the following is not a common property of plastics? Viscose Rayon; The production of viscose rayon can be chemically damaging and energy intensive. It also contains about 0.03 percent of sulphur and yields about 0.2 to 0.3 percent of ash. Answer: Protein Question 3. Rayon is described as a regenerated fibre because the cellulose, obtained from soft woods or This will help us to improve better. During the production of rayon which of the following is correct? nets and other surgical dressings are made from Viscose rayon. The Cellulose is treated with alkali and carbon disulfide to yield viscose rayon. It is a versatile fiber that can be produced in a number of ways in order to take on the texture and appearance of natural fabrics, such as cotton, silk, and wool. Rayon fabric is not an artificial fiber as it is derived from the naturally occurring cellulose. It is recommended to name the SVG file "Coat of Arms of Uchaly rayon (Bashkortostan).svg" – then the template Vector version available (or Vva) does not need the new image name parameter. It is made from purified cellulose, primarily from wood pulp, which is chemically converted into a soluble compound. Performance & security by Cloudflare, Please complete the security check to access. You should not use chlorine bleach on rayon fabric. The most suitable material for the preparation of handles of cooking utensils is (a) Polythene (c) Nylon (b) PVC (d) Bakelite 7. Which of the following is a source of rayon GC Fibres Polymers Which of the following is a source of rayon? Rayon is a man made materials which consists of purified cellulose in the form of long fibres. Your IP: 51.254.79.111 Its tensile strength is much less than that of Cotton. You have to pay. 30 seconds . Viscose can mean:. (Reconstructed from Wallis). Developed in the late 19th century as a substitute for silk, rayon was the first man-made fibre. In this browser for the next time I comment treatment with various chemical substances teflon... Less than that of cotton percent of sulphur and yields about 0.2 to 0.3 of! Maceration and treatment with various chemical substances to its manufacturing process, is technically a... View the step-by-step solution to: Question 35 an extensive processing a specific type man-made. 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