Exercises
Jharkhand Board Science Solutions for Exercises
Simple step-by-step solutions to Exercises questions of Synthetic Fibres and Plastics from SCIENCE : CLASS VIII. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.
Questions from Exercises with Hints & Solutions
Rayon is different from synthetic fibres because
Synthetic fibres are synthesised from raw materials called _____. (petrochemicals/ plastics)
Fill in the blank with the correct option given in the bracket.
Like synthetic fibres, plastic is also a _____ (polymer/monomer).
Should the handle and bristles of a toothbrush be made of the same material? Explain your answer.
'Avoid plastics as far as possible'. Comment on this advice.
Match the terms of column A correctly with the phrases given in column B.
| A | B |
| (i) Polyester | (a) Prepared by using wood pulp |
| (ii) Teflon | (b) Used for making parachutes and stockings |
| (iii) Rayon | (c) Used to make non-stick cookware |
| (iv) Nylon | (d) Fabrics do not wrinkle easily |
'Manufacturing synthetic fibres is actually helping conservation of forests'. Comment.
Describe an activity to show that thermoplastic is a poor conductor of electricity.
