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Standard VIII
Chemistry
Natural Fiber
Question

X is a thread or filament from which Y is made. If prepared from plants and animals, it is known as Z fibres whereas by humans it is known as W fibres. Artificial or synthetic fibres are nylon, rayon, polyester, acrylic, etc.

What is Z?
  1. None of the above
  2. Natural
  3. Artificial
  4. Both A and B

A
Artificial
B
Natural
C
Both A and B
D
None of the above
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Solution
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Fibre is the basic unit of raw material having a suitable length, and strength for conversion into yarns and further into fabrics/cloth/material.

Fibres can occur naturally or can be produced artificially.

Here, X is a fibre, Y is the cloth/fabric. Z is the natural fibre and W is the artificial or human-made fibre.

Plant and animal fibres are natural fibres, and artificial fibres are man-made fibres such as rayon.

Therefore, option B is correct.

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Similar Questions
Q1
X is a thread or filament from which Y is made. If prepared from plants and animals, it is known as Z fibres whereas by humans it is known as W fibres. Artificial or synthetic fibres are nylon, rayon, polyester, acrylic, etc.

What is Z?
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Q2
Statement I: A thread made of cotton is stronger than the identical thread made of nylon.
Statement II: Acrylic fibres are also known as artificial wool.
Statement III: Rayon is an example of semi-synthetic fibre.

Which of the given statements is/are correct?

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Q3
Read the following statement and mark the correct answer

I. Artificially prepared synthetic fibre which resembles silk is known as terylene.
II. Rayon is not considered a synthetic fibre as it is regenerated from cellulose.

III. Bottles and jars are made up of PET.

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Q4

The man-made fibre made from the cellulose polymer is :

(a) nylon (b) acrylic (c) rayon (d) polyester

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Q5
Are these statements true or false? Rewrite the false ones correctly.
(a) Polymers are small molecules made by stringing together several monomers.
(b) Blended fabrics contain only synthetic fibres.
(c) Dusters made of nylon or other synthetic materials are good for use in the kitchen.
(d) Polyester fibres are obtained from petroleum products.
(e) Terylene, a synthetic fibre, can be used instead of wool.
(f) Rayon, which is obtained from cellulose, is a natural fibre.
View Solution