Q. 85.0( 3 Votes )
Fill in the blanks
i) Synthetic Fibres are also called as ______ Fibres.
ii) Synthetic Fibres are synthesized from a raw material called ______
iii) Like synthetic fiber, plastic also ______
iv) Clothing labels are______
a) Required by law
b) Identify fabric content
c) Both a and b
d) None of the above
v) Rayon is made of
a) Coal b) Oxygen c) Flax d) Cellulose
vi) A silk fiber’s smooth surface absorbs light
a) yes b) no c) can’t say
Answer :
(i) man-made
Reason: They are prepared in the labs by the humans with the help of chemicals.
(ii) petrochemicals
Reason: Synthetic Fibres are made up of polymers who are further made up of petrochemicals.
(iii) polymers
Reason: Polymers are made up of large no of monomers and synthetic Fibres and plastic are both made up of monomers.
(iv) c
Reason: According to the law issued by the government the tag should be there in the cloth that will help identify the texture, size and the fabric content.
(v) d
Reason: Rayon is made from the chemical treatment of wood pulp and cellulose forms the wood pulp.
(vi) b
Reason: Silk surface has very luster due to which it sends back all the rays falling on it.
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