Tag: animal fibre

Questions Related to animal fibre

During fiber making _______ can occur.

chemistry animal fibre wool - animal fibre wool fibres from animals

  1. physical hazards

  2. chemical hazards

  3. biological hazards

  4. none of these

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Correct Option: A
Explanation:

The process of Fibre making involves a lot of physical hazards such as physical injuries during the process, heat, noise, dust, etc.


Hence the option A is correct.

The fleece of the sheep along with a thin layer of skin is removed from its body.This process is called___________.

chemistry animal fibre wool - animal fibre wool fibres from animals

  1. shearing

  2. threading

  3. rearing

  4. breeding

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Correct Option: A
Explanation:

The fleece of the sheep along with a thin layer of skin is removed from its body. This process is called shearing. Usually, hair are removed during the hot weather which enables the sheep to survive without their protective protective coat of hair.


Hence, the correct option is $\text{A}$

 Which of the following does not yield wool? 

chemistry animal fibre wool - animal fibre wool fibres from animals

  1. Camel

  2. sheep

  3. goat

  4. woolly dog

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Correct Option: D

Which of the following represents correct statement(s)?

chemistry animal fibre wool - animal fibre wool fibres from animals

  1. Two sets of yarn are woven to make a fabric.

  2. The weaving of fabric is done in looms.

  3. The looms are either hand operated or power operated.

  4. All of the above

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Correct Option: D
Explanation:

All of these represent correct statement 

Hence,
option $D$ is correct answer.

Select the correct statement from the following.

chemistry animal fibre wool - animal fibre wool fibres from animals

  1. polyester is obtained from plant stem

  2. jute is the outer covering of coconut

  3. spinning is a process of making fibers

  4. the yarn is made from fibers

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Correct Option: D
Explanation:

Yarn is made up from fibers.

Hence, 
option $D$ is correct answer.

Which kind of wool is common in Tibet and Ladhak? 

chemistry animal fibre wool - animal fibre wool fibres from animals

  1. Yak

  2. sheep wool

  3. Angora wool

  4. Pashmina wool

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Correct Option: C

Match the column I with column II and mark the appropriate choice.

Column I Column II
(A) Natural polymer (i) Rayon
(B) Addition polymer (ii) Bakelite
(C) Copolymer (iii) Silk
(D) Semi-synthetic polymer (iv) Neoprene
chemistry animal fibre synthetic fibres & their characteristics processing of fibres synthetic fibres and its types

  1. (A) $\rightarrow$ (i), (B) $\rightarrow$ (ii), (C) $\rightarrow$ (iv), (D) $\rightarrow$ (iii)

  2. (A) $\rightarrow$ (iii), (B) $\rightarrow$ (iv), (C) $\rightarrow$ (ii), (D) $\rightarrow$ (i)

  3. (A) $\rightarrow$ (ii), (B) $\rightarrow$ (iii), (C) $\rightarrow$ (i), (D) $\rightarrow$ (iv)

  4. (A) $\rightarrow$ (iv), (B) $\rightarrow$ (i), (C) $\rightarrow$ (iii), (D) $\rightarrow$ (ii)

Show answer
Correct Option: B
Explanation:
 Natural rubber  (iii)
 Addition polymer  (iv)
 Copolymer  (ii)
 Semi-synthetic polymer  (i)

Natural polymer-These polymers are found in plants and animals. Examples are proteins, cellulose, starch, resins rubber and rayon.

The correct option is [B].

Which of the following is not a natural polymer?

chemistry animal fibre synthetic fibres & their characteristics processing of fibres synthetic fibres and its types

  1. Starch

  2. Nucleic acid

  3. Polystyrene

  4. Protein

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Correct Option: C
Explanation:

Polystyrene is made of styrene monomer which is a synthetic polymer. The monomer is a liquid petrochemical.

Polystyrene are used in making CD, jewel cases, expanded polystyrene (EPS) Foam products from Foam cups to Foam coolers, etc.

The naturally occurring polymer among the following is:

chemistry animal fibre synthetic fibres & their characteristics processing of fibres synthetic fibres and its types

  1. Rayon

  2. Nylon - $6$

  3. Decron

  4. Proteins

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Correct Option: D
Explanation:

NATURAL  POLYMER  -  The polymers found in nature, i.e., from plants & animals are known as natural polymers.
RAYON - Rayon is classified as semisynthetic polymer, as it is manufactured from naturally occuring polymers. It is purified from cellulose.
NYLON - $6$  -  Nylon - $6$ is a synthetic polymer, obtained by heating caprolactum with water at high temp.
DACRON  -  It is also a synthetic polymer. It is formed by interaction of ethylene glycol & terephthalic acid.
PROTEINS  -  Proteins are large macromolecules, containing one or more chains of amino acids. They are held together by peptide bonds. Amino acids are found in living organisms. Hence, they are natural polymer.

Cellulose is a polymer of:

chemistry animal fibre synthetic fibres & their characteristics processing of fibres synthetic fibres and its types

  1. $\alpha -$ galactose

  2. $\alpha -$ glucose

  3. $\beta -$ galactose

  4. $\beta-$glucose

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Correct Option: D
Explanation:

Cellulose is an organic compound consisting of a linear chain of several hundred to over ten thousand $\beta$ (1 $\rightarrow$4) linked $D - glucose$ units.