Synthetic Fibres And Plastics Class 8 Pdf Download

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Synthetic Fibres And Plastics Class 8 Pdf Download >> http://shorl.com/tovivabrestegi

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Synthetic Fibres And Plastics Class 8 Pdf Download

 

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See Also Lesson Experiment Examples Summary Exercise Solved Exercise Lessons Now Playing Lesson Watch similar videos here - Study more lessons from Class 8 Science X You have completed section. These are called synthetic fibres. {text} {value} {value} Questions View Single {buttonPadHtml} {qusremain} {totalmarks} Time Remaining {timer} Test Summary {buttonPadHtml} Time & Date Taken {time} {date} Total Marks Marks Scored % {totalMarks} {marksScored} {percentScored} Percentile As on Date Update {percentile} {asOnDate} {totalQs} {correctlyAnswered} {wronglyAnswered} {unAttempted} Solved Exercises Lessons List . Have a doubt? Clear it now. Question 1: Explain why some fibres are called synthetic. Plastics add to the environmental pollution.

 

Question 7: Explain why the following are made of thermosetting plastics. Teflon, a kind of plastic is used as a coating to manufacture non-stick cookwares. Terylene is a popular form of polyester, which can be drawn into very fine fibres. They cannot kurikulum berbasis kkni pdf download burnt as when burnt, they release poisonous gases. 1340 Wallis and Futuna +681 Western Sahara +1 Zambia +260 Zimbabwe +263 Enter your Mobile no. Download our Apps Facebook YouTube Twitter Google Plus . This is because of their non-reactive nature with most materials. Rayon mixed with cotton to make bed sheets and curtainsor with wool to make carpets. Instead, they are made by chemical processing of petrochemicals. Answer: Raw materials for natural fibres are mainly derived from plants and this means cutting a lot of trees.

 

Therefore, the bristles are made up of nylong fibres which are strong, elastic, lustrous, light weight and easy to handle and the handle is made of hard plastic as it is strong, durable, poor conductor of heat and electricity. Please enter email. Thermosetting plastic Thermoplastic Thermosetting plastic cannot be bent easily. It is easy to dye in a wide range of coloursand drapes well. 3 Example: PVC, Polythene Bakelite and Melamine Q7.Explain why the following are made of thermosetting plastics.