Answer: Thermoplastic The plastic which gets deformed easily on heating and can bern easily is. Question 1. One-time use throw away plastics can often be avoided. 2. Answer: Question 1. Answer: Shape material to form a cup or bowl. (a) Assertion is true, Reason is true; Reason is a correct explanation for Assertion (b) Assertion is true, Reason is true; Reason is not a correct explanation for Assertion (c) Assertion is true, Reason is false (d) Assertion is false, Reason is true. Bakelite and melamine are thermoplastics( true or false) - 14613642 1 ... School +5 pts. Answer: Question 2. View Answer. It is also used in other products like toys, jewellery, kitchen ware etc. View Answer. What do you observe while the cotton cloth burns? Correct statement : can be found in toothpaste, facewash and bodyscrubs. ? Question 7. Take an iron stand with a clamp. Answer: Question 5. Cotton: natural:: Polyester: ______ What does the term biodegradable mean? I. Nylon (i) Thermoplastic II. Shape material to form a cup or bowl. La Bakélite est la marque de fabrique d'un matériau de la classe des phénoplastes dont la nomenclature chimique officielle est anhydrure de polyoxybenzylméthylèneglycol.Ce fut le premier plastique fait de polymères synthétiques du benzène sous solvants. (iv) Starch, cellulose, proteins, silk and rubber are natural polymers. Answer: Why 11. The reason why a plastic cup placed inadvertently near the fire becomes deformed is that it is made of a thermoplastic resin. True or False : Question 1. HIPS ? (a) Paper Answer: Why? Why Ramya’s mother advised her not to wear synthetic clothes while working in kitchen? False 7. Melamine resin or melamine formaldehyde (also shortened to melamine) is a hard, thermosetting plastic material made from melamine and formaldehyde by polymerization. 2. Mention a few household products in which microbeads can found. But if we cool the liquid fast enough, the atoms of the silica will be halted in their tracks, they won’t have time to line up, and they will be stuck in any old arrangement, with no order to the arrangement of the atoms. What kind of fabric is suitable to dress-up and play in summer? 2) These possess weak intermolecular forces of attraction between polymer chains. Which type of fibre is the weakest? Some types of rayon are made from the short cotton fibres left on cotton seeds after ginning. C melamine. Answer: Look at the list of eight plastic items. With the help of the resin code chart, mark the resin code number, acronym, if you think it is a safer, unsafe or questionable (when you cannot find the resin code in the article) type of plastic. Test Yourself. PVC; Which of the following is used to manufacture carrier bags? D. D Bakelite. Add weights starting from 10 grams one by one, until the thread breaks. Plastic disposal is the 5 R principle, Refuse, Reduce, Reuse, Recycle and Recover is called as 5 R principle. Refuse (avoid) is the best way to manage plastic. Melamine (MF) ? A long chain made of small repeating monomers. (ii) All polymers are natural materials. False Synthetic fibres are moth and insect resistant. These fibres are strong and elastic which gives it the properties to bounce. Nylon-66 is a fibre as in it the forces of attraction are H-bonding. True 5. Answer: True. Is the resin code safer, un safe or questionable? Thermoplastic: Bakelite: Thermosetting: PET: Polyester: Acrylic: Artficial wool: cellouse: Chain of glucose units: Paper: Biodegradable : Plastic Bags: Non-biodegradable: Teflon: Cook wares: State whether the statements given below are True or False’. True B. (b) cotton, Question 2. Answer: Question 15.12(i) Write the monomers used for getting the following polymers. iii) True because synthetic clotes melts … All the ______ present in your body are polymers. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. (a) Bakelite Question 9. Since, wool is made from hair of sheep, it gives smell of burning hair. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. d. A is false but R is true. True 4. (c) Silk, Question 10. All other given statement are true. (c) PVC Answer: Question 2. False 3. Network Polymers Are Small Molecules That Form 3 Or More Active Covalent Bonds. Samacheer Kalvi 10th Model Question Papers, Samacheer Kalvi 7th Science Book Solutions. Question 3. 7. A 0.1nm-100nm B. Answer: 1. Question 2. If a new generation starts in every 30 years, how many generations would it take to see the plastic bag finally broken down? Both A and R are true but R is not the correct explanation of A. (b) Cotton Umbrella cloth dries the fastest. Look at the following picture and explain what is happening. (v) Polyethylene terephthalate (PET) is used in making clothes. ? Melamine is used for making floor tiles, kitchenware etc. Thermoplastic. Answer: BeTrained.in has solved each questions of NCERT Exemplar very thoroughly to help the students in solving any question from the book with a team of well experianced subject matter experts. A lot of the plastic produced globally is designed to be used only once and thrown away, creating a large amount of plastic waste. (c) Soluble in water [CBSE AIPMT 2012] A. Polystyrene and PVC are thermoplastics. Correct statement: Bakelite and and melamine are some examples of thermosettingplastic, Question 7. Learn important concepts related to polymers like PVC, Bakelite and lot more. d) Bakelite is a thermoplastic. Others are ‘thermosetting’: like eggs, they cannot revert to their original viscous state, and their shape is thus fixed for ever Bakelite had the distinction of … Continuously mix on medium heat until the liquid turns clear. False 10. Name the unit used in the formation of a polymer. Assertion (A) : It takes a very long time for nylon clothes to breakdown into microfibers but cotton clothes need only six months to decompose. Write a note on manufacturing of glass. Answer: Why? (b) Polyester (c) Acrylic, Question 5. Right and wrong application of plastics. Others are ‘thermosetting’: like eggs, they cannot revert to their original viscous state, and their shape is thus fixed forever, Bakelite had the distinction of … A type of fibre that is naturally obtained from a cocoon. True, Question 11. The process by which monomers are linked together by covalent bonds to form polymers is called polymerization. Answer: 6. True 9. Bakelite is an item a jewelry collector should keep an eye out for considering how prices have risen over the last few decades. D. Terylene. Wood dust, Diatomaceous earth, cement dust, and a lot of sand is full of super fine silica dust. It came in several colors, including translucent and marbled shades by the 1950s. It break down into very small pieces called microplastics which cause pollution to soil and water bodies such as rivers, lakes and oceans. PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. When the liquid begins to bubble it is ready to be taken off the stove. Why is it better to avoid the use of plastic products? Bakelite. Page No 44: Question 6: Which of these plastics can be repeatedly heated and moulded into any desired shape? Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. The learner can feel the fibre and write down the name of the fibre and state whether it is natural or synthetic fibre. Answer: (c) Acrylic Reason- Bakelite is a thermosetting plastic. (d) Plastic carry bag (iii) It is risky to wear synthetic clothes while working in … (iii) Polythene is thermosetting plastic. (a) Cotton Used to make parachutes. That's true of many foam product. So, she advised here not to wear synthetic clothes while working in kitchen. A. Cellulose B. Starch C. Rubber D. DNA 16. Question 9. Melamine. A bucket made of plastic does not rust like a bucket made of iron. Question 3. What is the full form of PVC? It is a thermosetting plastic … True 7. Read the following information and convert them into a graph to compare the countries and the amount of plastic they use. Bakelite is a phenol-formaldehyde resin. (d) All of these, Question 3. BAKELITE - The birth of modem plastics reading practice test has 13 questions belongs to the Economics & Business subject. Question 1. Reason (R) : Plastics end up polluting the environment. Nylon thread is the strongest thread. True ii) False- Synthetic fibres do not melt on heating. Answer: Question 1. (a) Blood bags ... Melamine is … b) Plastics are not affected by heat. A polymer used for making rope. Jammu & Kashmir has banned the use of plastic bags. Most synthetic fibres absorb very little moisture and do not allow air circulation making them hot and uncomfortable to wear. Tamil Nadu 12th English Model Question Papers 2020-2021, Tamil Nadu 12th Biology Model Question Papers 2020-2021 English Tamil Medium, Tamil Nadu 12th Chemistry Model Question Papers 2020-2021 English Tamil Medium, Tamil Nadu 12th Physics Model Question Papers 2020-2021 English Tamil Medium, Tamil Nadu 12th Maths Model Question Papers 2020-2021 English Tamil Medium, Samacheer Kalvi 10th Model Question Papers 2020-2021 Tamil Nadu English Tamil Medium, Samacheer Kalvi 10th Tamil Model Question Papers 2020-2021 Tamil Nadu, Samacheer Kalvi 10th English Model Question Papers 2020-2021 Tamil Nadu, Samacheer Kalvi 10th Social Science Model Question Papers 2020-2021 English Tamil Medium Tamil Nadu, Samacheer Kalvi 10th Science Model Question Papers 2020-2021 English Tamil Medium Tamil Nadu, Samacheer Kalvi 10th Maths Model Question Papers 2020-2021 English Tamil Medium Tamil Nadu. Bakelite B. Melamine C. Branched D. Poly-vinyl chloride 9. Soln: ... (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. D. The assertion is false but the … Note down the total weight required to break the cotton thread. True, Question 2. Question 3. Option: View Answer. Time it out for real assessment and get your results instantly. Question 2. Kharif, Rabi 2. True ii) False- Synthetic fibres melt on heating. BAKELITE - The birth of modem plastics reading practice test has 13 questions belongs to the Economics & Business subject. ... bottle containers 8. Previous Year Papers. ... Neoprene rubber are thermoplastic polymers. c. A is true but R is false. Cellulose, Starch, etc. synthetic fibres such as polyester is that they are not heat resistant and catch fire easily. 11. Burning of plastics and synthetic fabrics is not a good solution, as we end up wasting non-renewable resources and produce super toxic chemicals that are difficult to store or dispose safely. All solutions are explained using step-by-step approach. (b) burns (a) Plastic 4. The Tamil Nadu Government has banned the use of one-time use throw away plastics. Answer: Answer: Question 4. Fibre that is used as synthetic wool. Question 10 It is a thermoplastic, while bakelite, melamine and formica are thermosetting plastics. 4. Answer: Very Short Answer Type Questions 1. 6 Which of the following is the thermoplastic material? Question 8. Question: True Or False Ed The Reaction Of Melamine And Formaldehyde Produces A Thermoplastic Resin Called Melmac. (b) Polyester and terylene Thermosetting plastics are those plastics which once moulded, cannot be softened by heating. (d) plants and animals (ii) All polymers are natural materials. do you think this is important? Answer: Understand the Key Differences Between Thermoplastic and Thermosetting Plastic with detailed explanations and examples. True 6. Tamilnadu State Board Text Books Solutions for Class 6 to 12. Answer: 14. Answer: Hot foot stuff should not be kept in polythene containers. How Strong is Nylon? Different chemicals (additives) are added to plastic to give them various qualities and characteristics. Odd one out: choose the letter of the word that is not related from the other choices. False 4. Nylon. It contributes sturdy structure to the plants. hema9950 hema9950 Answer: True , Bakelite and melamine are example of thermoplastic. Pressure cookers are quite heavy even without the metal handles. Indonesia uses 10%, both the Philippines and Vietnam use 6% each; Thailand uses 3.2%, Egypt 3%, Nigeria 2.7% and South Africa 2%. Answer: Question 3. True or False Type Questions 1. False 2. The increase in the use of plastics, particularly the one-time use and throw away plasticshas serious impacts on the environment, animals and our health. True, Question 6. Answer: Question 15. Bakelite, Melamine. A lot of one-time use plastic such as polythene bags and food packaging that are thrown away are responsible for littering the environment and clogging drains. Give two examples of thermosetting plastics. FALSE; PVC is a thermoplastic. Synthetic. Melamine. Question 8. B 10nm-50nm ... 5 Polymers have low density A. 12. An example of a thermosetting platics. Answer: (a) Nylon Which type of fibre is the strongest? (i) The fabric terywool is obtained by mixing terylene and wool. (c) Rayon Natural polymers are the products of raw materials found in nature that can be extracted. Question 4. True 9. Test Series. Many animals confuse plastic for food and eat it by accident. A good application of plastic is the use of ________ Question 4. 10. Write the importance of rayon. Question 4. (d) Nylon On burning wool, why we get the small of burning of hair? 13. b) P.E.T. Question 1. Question 6. All other given statement are true. Answer: (D) Bakelite. (d) Wood NCERT Books. So it is easier to handle the utensil while cooking. D. CH 3 COCH 3. Question 1. Previous Year Papers. What kind of umbrella do we use? (a) Nylon Question 27. 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