Extra questions of chapter 3 with answers of class 8 of science
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Types of fibres
Define the types
What are nylon and it's uses
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Here are 10 IMP Questions
(i)What are Petrochemicals?
(ii)What are the advantages and disadvantages of plastics?
(iii)What are Synthetic fibres? Name any 2 synthetic fibres and where they are used.
(iv)What is Monomer and Polymer?
(v)Differentiate between Biodegradable and Non-Biodegradable substances with examples
(vi)Name some uses of plastics in health care industries.
(vii)Differentiate between Thermoplastics and Thermosetting plastics with 2 examples each.
(viii)What is Teflon? Where is it used?
(ix)Why is it said to use jute/cotton bags for shopping? How are Polybags hazardous to animals?
(x)What are the 5R? What are Esters?
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