Anil Ahlawat Solutions for Chapter: Synthetic Fibres and Plastics, Exercise 1: EXERCISES
Anil Ahlawat Science Solutions for Exercise - Anil Ahlawat Solutions for Chapter: Synthetic Fibres and Plastics, Exercise 1: EXERCISES
Attempt the practice questions on Chapter 3: Synthetic Fibres and Plastics, Exercise 1: EXERCISES with hints and solutions to strengthen your understanding. NSO Science Olympiad Workbook Grade 8 solutions are prepared by Experienced Embibe Experts.
Questions from Anil Ahlawat Solutions for Chapter: Synthetic Fibres and Plastics, Exercise 1: EXERCISES with Hints & Solutions
Fill in the blanks by picking up the correct words.
Fibres are materials that are usually thin and have a thread-like structure. They are generally classified as and , on the basis of their origin. Natural fibres may be plant fibres like or animal fibres like .
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Sneha has classified a few materials as shown in the table.
S. No. | Material | Type/Nature |
1. | Nylon | Synthetic and non-biodegradable |
2. | Jute | Natural and non-biodegradable |
3. | Coir | Synthetic and biodegradable |
4. | Wool | Natural and biodegradable |
5. | Acrylic | Blended and biodegradable |
6. | Polyester | Synthetic and non-biodegradable |
The materials which are classified incorrectly are
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Anisha prepared a flow chart to show the classification of fibres and plastics. She left a few columns blank. Fill in the blanks by selecting the option with the correct words.
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A few polymers are grouped together on the basis of some common properties as follows:
Group I : Rayon, acrylic, nylon, jute
Group II : PVC, melamine, teflon
Group III : Polycot, terrywool, acrylic
Select the odd one out in groups I, II and III.
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Which of the following applications of plastics show(s) that plastics are bad conductors of electricity?
I. Refrigerators have insulating wool of plastics
II. Electric wires have a plastic coating
III. Chemicals are stored in plastic containers
IV. Parachutes are made from plastics
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Read the given passage and fill in the blanks by selecting an appropriate option.
Cellulose is a naturally occurring fibre. The walls of __(i)__ are made of cellulose. It is used in making a synthetic fibre __(ii)__ which resembles the most expensive natural fibre __(iii)__ in appearance hence, it is also called __(iv)__.
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Read the following statements carefully.
P. I am extensively used in the healthcare industry, but my one disadvantage is that I am non-biodegradable
Q. I am very familiar form of polyester and used for making bottles, utensils, films, wires, etc
R. I am artificial silk and mixed with wool to make carpets
and are
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Match column I with column II and select the correct option from the given codes.
Column I | Column II | ||
P. | Nylon | (i) | Burns quickly with a smell of burning paper |
Q. | Wool | (ii) | Burns with sooty flame, fabric shrinks and black beads are formed |
R. | Acrylic | (iii) | Shrinks after exposure to flame, forms hard beads and gives a smell of burning hair |
S. | Rayon | (iv) | Burns slowly with a smell of burning hair |
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