Answer. These MCQ Questions on Synthetic Fibres and Plastics Class 8 with answers pave for a quick revision of the Chapter thereby helping you to enhance … Learn vocabulary, terms, and more with flashcards, games, and other study tools. True. 25 State whether the following statements are True/False. 7. T F 2. Explain why some fibres are called synthetic. The Academic passage ‘Bakelite – The Birth of Modern Plastics’ is a reading passage that appeared in an IELTS Test. Synthetic fibre do not melt on heating. Can you write the ... Indicate whether the following statements are True or False. True. Fill in the blanks. Bakelite was unique because it was the first material to be both entirely 2. in origin, and thermosetting. Answer: True. c) Acrilon is pure wool obtained from sheep. Write full forms of: a) P.V.C. Which is a thermosetting plastic? Answer: Bakelite. If both assertion and reason are false. Some plastics behave in a similar way to 1. Answer. Solving the Synthetic Fibres and Plastics Multiple Choice Questions of Class 8 Science Chapter 3 MCQ can be of extreme help as you will be aware of all the concepts. 6. false, false, true, true, true. TRUE FALSE if the statement agrees with the information if the statement contradicts the information … 4. Give two examples of each. Some plastics behave in a similar way to 1 .In that they melt under heat and can be moulded into new forms. The strong bonds between polymers also mean that thermosetting plastics are much more heat resistant than thermosoftening ones. Which of two is thermosetting plastic—PVC or bakelite? Also write the false statements in their correct form. Question 21. Ans: Thermosetting plastics are kind of plastic which once moulded cannot moulded again by heating. Hence, it is a thermosetting ploymer. Question 20. It is risky to wear synthetic clothes while working in the kitchen. Explain the difference between thermoplastic and thermosetting plastics. Some are ‘thermoplastic’, which means that, like candlewax, they melt when heated and can then be reshaped. The fabric tery wool is obtained by mixing terylene and wool. Name a synthetic fibre which is polyamide. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. Can you write the major difference between these two types of plastics? Question. is a good conductor of plastics. T F 1. Melamine, which is used for kitchen surfaces, is an example of a thermosetting plastic (sometimes … GENERAL SCIENCE CLASS : VIII Chapter 3 : Synthetic Fibres and Plastics ANSWER KEY Multiple Choice Questions :- Q.1 Bakelite is Answer:-(c) thermosetting plastic Q.2 A number of glucose units make up the polymer Answer:-(c) celluloseQ.3 Polycot is made up of Answer:-(c) polyester and cottonQ.4 Synthetic fibres cause soil … PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. We have provided Electricity and Circuits Class 6 Science MCQs Questions with Answers to help … Also, bakelite is a poor conductor of electricity, hence, it protects us from getting electric shocks. 3. b) Plastics are not affected by heat. Whereas, the others mentioned are thermoplastics that can be moulded on heating. (a) Melamine (b) Polythene (c ... (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. (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. Give examples which indicate that nylon fibres are very strong. Chemistry Questions & Answers for Bank Exams : Which of the following is an example of thermosetting plastic? Question 19. Differentiate between thermoplastics and thermosetting plastics. Which one of the three polymer types is not normally considered to be a plastic: (a) thermoplastics, (b) thermosets, or (c) elastomers ... true or (b) false? Classify the following compounds into natural and synthetic polymers. Answer: (D) Bakelite. 10. Assertion-Rayon is called artificial silk. The assertion ( i ) both a and R is correct explanation of the Polymer chains or False...! 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