Tag: chemistry

Questions Related to chemistry

Which of the following is a fibre?

chemistry fibre to fabric: plant fibre classification of fibres fibres history of fabric

  1. Rayon or artificial silk

  2. nylon

  3. acrylic

  4. All of the above

Show answer
Correct Option: D
Explanation:

Rayon or artificial silk, nylon and acrylic represents fibre. Polyester and cotton are another example of fibre.

Linen fibre is obtained from __________.

chemistry fibre to fabric: plant fibre classification of fibres fibres history of fabric

  1. chia seeds

  2. cotton seeds

  3. flax plants

  4. cotton flowers

Show answer
Correct Option: C
Explanation:
Linen yarn is spun from the long fibers found just behind the bark in the multi-layer stem of the flax plant. In order to retrieve the fibers from the plant, the woody stem and the inner pith, which holds the fibers together in a clump, must be rotted away. 

The cellulose fiber from the stem is spinnable and is used in the production of linen thread, cordage, and twine.

So, option C is correct.

Which of the following represent(s) the characteristics of synthetic fibres?

chemistry fibre to fabric: plant fibre classification of fibres fibres history of fabric

  1. They dry up quickly.

  2. They are durable

  3. They are less expensive and readily available.

  4. They are easy to maintain

Show answer
Correct Option: A,B,C,D
Explanation:

 All of the following represent(s) the characteristics of synthetic fibres.
They dry up quickly.
They are durable
They are less expensive and readily available.
They are easy to maintain

To which of the following does the 4R principle apply the most?

chemistry fibre to fabric: plant fibre classification of fibres fibres history of fabric

  1. Synthetic fibre

  2. Natural fibre

  3. Metals

  4. Plastic

Show answer
Correct Option: D
Explanation:
Plastic is a man-made substance that cannot be broken down by natural microbial action. Hence, the 4R principle is applied to it. 

The 4 R principle is- ${\text{Refuse, Reduce, Reuse and Recycle}}$. This helps in reducing the harmful effect of plastic in the environment. 

Thus the correct answer is option A.

Bed sheets, curtain, tents, parachutes can be made from :

chemistry fibre to fabric: plant fibre classification of fibres fibres history of fabric

  1. Natural fibre

  2. Synthetic fibre

  3. Yarn

  4. Plastics

Show answer
Correct Option: A,B,C
Explanation:
Bed sheets, curtain, tents, parachutes are made from fabric like cotton, silk, nylon, rayon etc. and the fabric is a cloth produced by weaving or knitting textile fibers. 

These fibers can be obtained naturally from plant or animal sources like cotton seeds and silk, wool or can be synthesized like nylon or rayon.

Therefore, natural and synthetic fibers are used to make fabric.

Yarn is a long continuous length of interlocked fibres, suitable for use in the production of textiles, sewing, crocheting, knitting, weaving, embroidery, or ropemaking. Thread is a type of yarn intended for sewing by hand or machine.

Plastics are synthetic polymers and not used in fabric production.

Hence, option A, B and C are correct.

The small fluffy fibres are:

chemistry fibre to fabric: plant fibre classification of fibres fibres history of fabric

  1. bolls

  2. burrs

  3. reels

  4. combs

Show answer
Correct Option: B
Explanation:

Burrs are the small filthy fibers. This has a pattern of knots. 

$X$ is a thread of 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. Synthetic fibres are nylon, rayon, polyester, acrylic etc.

What is $Z$?

chemistry fibre to fabric: plant fibre classification of fibres fibres history of fabric

  1. Plant fibre

  2. Animal fibre

  3. Natural fibre

  4. Artificial fibre

Show answer
Correct Option: C
Explanation:

Fibre is the basic unit of raw material having a suitable length, pliability, and strength for conversion into yarns and fabrics/cloth/material. 

A fibre of extreme length is a filament. 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 fibre are natural fibres, and artificial fibre are man-made fibres such as rayon.

Therefore, option C is correct.

The eggs of silkworms are stored in:

chemistry fibre to fabric: plant fibre classification of fibres fibres history of fabric

  1. Wooden box

  2. Metal box

  3. Strips of the cloth

  4. Plastic box

Show answer
Correct Option: C
Explanation:

The female silk moth lays 200 eggs at a time, these eggs are stored on strips of cloth. The stored eggs are then kept under hygienic conditions, suitable temperature and humidity.

Which of the following house hold articles is not made up of fibre?

chemistry fibre to fabric: plant fibre classification of fibres fibres history of fabric

  1. Cloth

  2. Table

  3. Rope

  4. Carpet

Show answer
Correct Option: B
Explanation:

Table is made up of wood or wood pulp but cloth, rope and carpet are made up of various types of fibres and yarns which form these materials.


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

Endoscope is made up of:

chemistry fibre to fabric: plant fibre classification of fibres fibres history of fabric

  1. glass wool

  2. optical fibres

  3. optical glass

  4. lead crystal glass

Show answer
Correct Option: B