Tag: classification of fibres

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Questions Related to classification of fibres

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

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

  1. Synthetic fibre

  2. Natural fibre

  3. Metals

  4. Plastic
Reveal answer Fill a bubble to check yourself
D Correct answer
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.
Multiple choice chemistry fibre to fabric: plant fibre classification of fibres fibres history of fabric

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

  1. Natural fibre

  2. Synthetic fibre

  3. Yarn

  4. Plastics
Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
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.
Multiple choice chemistry fibre to fabric: plant fibre classification of fibres fibres history of fabric

$X$ 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 $Z$?

  1. Plant fibre

  2. Animal fibre

  3. Natural fibre

  4. Artificial fibre
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

Spandex is used in garments because :

  1. elasticity.

  2. strength.

  3. biodegradable.

  4. Both A and B.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Spandex, Lycra or elastane is a synthetic fiber known for its exceptional elasticity. It is stronger and more durable than natural rubber. Because of its elasticity and strength (stretching up to five times its length), spandex has been incorporated into a wide range of garments, especially in skin-tight garments. A benefit of spandex is its significant strength and elasticity and its ability to return to the original shape after stretching and faster drying than ordinary fabrics.

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

Which of the following can define molecules in the liquid state?

  1. Molecules vibrating in a fixed position and held in place by strong forces

  2. Molecules can rotate and roll over each other because the forces are moderately strong

  3. Molecules can move anyway in random because there are no forces holding the molecules together

  4. A state of matter which contains only charged particles
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In liquid, particles are loosely bound together by intramolecular forces. Unlike a solid, liquid has no fixed shape but instead has a characteristic readiness to flow and therefore takes on the shape of any container.

Forces between them are moderately strong as compare to solid.

Hence, option $B$ is correct.