NCERT Solutions for Class 7 Science Chapter 3: Fibre to Fabric

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NCERT Solutions for Class 7 Science Chapter 3 Fibre to Fabric are provided in this article. The important topics that are included in this chapter are:

Wool
Silk

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NCERT Solutions for Class 7 Science Chapter 3

NCERT Solutions for Class 7 Science Chapter 3 Fibre to Fabric are given below:

NCERT Solution

Class 7 Science Chapter 3 Fibre to Fabric: Important Topics

Fibres are thin, long, flexible, and hair or thread-like structures. The fibres are usually obtained from two main sources- Plants and Animals. These fibers are called Natural Fibres. Cotton, wool, and silk are examples of Natural Fibres.

Wool

Wool is referred to as the textile fibre obtained from sheep and other animals, which includes cashmere and mohair from goats, qiviut from muskoxen, hide and fur clothing from bison, angora from rabbits, and other types of wool from camelids.

Silk

Silk is a natural protein fibre, some forms of which can be woven into textiles. The protein fibre of silk is formed mainly of fibroin, which is produced by certain insect larvae to form cocoons. The best-known silk is obtained from the cocoons of the larvae of the mulberry silkworm Bombyx mori reared in captivity.

Chapter Related Links:

MCQs on fibre to fabric	MCQs on animal kingdom	Variety in Fabrics
Yarn to Fabric	History of Clothing Material	Animal Fibre
Silkworm	Spinning of cotton yarn	Synthetic Fibre
Fibrous Materials Uses	Jute	Plant Fibers

Class 7 Science Additional Resources:

CBSE Class 7 Science NCERT Textbook	CBSE Class 7 Science Sample Paper	NCERT Solutions

CBSE X Related Questions

1.
Sex is determined by different factors in various species. However, in human beings, it is determined genetically. Which amongst the following option(s) is/are correct for human beings ?
Gamete carrying X chromosome from female parent.
Gamete carrying X chromosome from male parent.
Gamete carrying Y chromosome from male parent.

(ii) and (iii)
(i) only
(i) and (iii)
(iii) only

View Solution

2.
Which of the following group is not 'biodegradable'?

Vegetable peels, dead leaves, paper
Cow dung, leather bag, water
Polythene bag, rubber band, ball pen
Paper, fruits, bones

View Solution

3.
The reasons for excessive generation of wastes are:
(i) Use and throw policy.
(ii) Increased availability of packaged food.
(iii) Increased construction wastes.
(iv) Non-sorting of dry and wet wastes

(i), (iii) and (iv)
(i), (ii) and (iii)
(i), (ii), (iii) and (iv)
(ii), (iii) and (iv)

View Solution

4.
The gases evolved on heating lead (II) nitrate crystals are :

NO and \( O_2 \uparrow \)
\( N_2 \) and \( NO_2 \)
\( NO_2 \) and \( H_2 \)
\( NO_2 \) and \( O_2 \)

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5.
Assertion (A): Ozone at higher levels of atmosphere is a product of UV radiation acting on oxygen molecule.
Reason (R): The higher energy of UV splits apart some molecular \( O_2 \).

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.

View Solution

6.
Assertion : In human beings, the respiratory pigment is haemoglobin present in red blood cells.
Reason (R) : Haemoglobin has a very high affinity for carbon dioxide.

Both, Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
Both, Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.

View Solution

NCERT Solutions for Class 7 Science Chapter 3: Fibre to Fabric

NCERT Solutions for Class 7 Science Chapter 3

Class 7 Science Chapter 3 Fibre to Fabric: Important Topics

Wool

Silk

CBSE X Related Questions

2.
Which of the following group is not 'biodegradable'?

3.
The reasons for excessive generation of wastes are:
(i) Use and throw policy.
(ii) Increased availability of packaged food.
(iii) Increased construction wastes.
(iv) Non-sorting of dry and wet wastes

4.
The gases evolved on heating lead (II) nitrate crystals are :

5.
Assertion (A): Ozone at higher levels of atmosphere is a product of UV radiation acting on oxygen molecule.
Reason (R): The higher energy of UV splits apart some molecular \( O_2 \).

6.
Assertion : In human beings, the respiratory pigment is haemoglobin present in red blood cells.
Reason (R) : Haemoglobin has a very high affinity for carbon dioxide.

Comments

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NCERT Solutions for Class 7 Science Chapter 3: Fibre to Fabric

NCERT Solutions for Class 7 Science Chapter 3

Class 7 Science Chapter 3 Fibre to Fabric: Important Topics

Wool

Silk

CBSE X Related Questions

2.Which of the following group is not 'biodegradable'?

3.The reasons for excessive generation of wastes are: (i) Use and throw policy. (ii) Increased availability of packaged food. (iii) Increased construction wastes. (iv) Non-sorting of dry and wet wastes

4.The gases evolved on heating lead (II) nitrate crystals are :

5.Assertion (A): Ozone at higher levels of atmosphere is a product of UV radiation acting on oxygen molecule. Reason (R): The higher energy of UV splits apart some molecular \( O_2 \).

6.Assertion : In human beings, the respiratory pigment is haemoglobin present in red blood cells. Reason (R) : Haemoglobin has a very high affinity for carbon dioxide.

Comments

SUBSCRIBE TO OUR NEWS LETTER

2.
Which of the following group is not 'biodegradable'?

3.
The reasons for excessive generation of wastes are:
(i) Use and throw policy.
(ii) Increased availability of packaged food.
(iii) Increased construction wastes.
(iv) Non-sorting of dry and wet wastes

4.
The gases evolved on heating lead (II) nitrate crystals are :

5.
Assertion (A): Ozone at higher levels of atmosphere is a product of UV radiation acting on oxygen molecule.
Reason (R): The higher energy of UV splits apart some molecular \( O_2 \).

6.
Assertion : In human beings, the respiratory pigment is haemoglobin present in red blood cells.
Reason (R) : Haemoglobin has a very high affinity for carbon dioxide.