Synthetic Fibres and Plastics Test

Result

Synthetic Fibres and Plastics Test - 25

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Weekly Quiz Competition

Question 1
1 / -0

Define plasticity.

A
Ability to regain its original shape.

B
Ability to flow when subjected to stress.

C
Ability to change shape permanently.

D
Both B and C.

Solution

Plasticity is the ability of certain solids to flow or to change shape permanently when subjected to stresses of intermediate magnitude between those producing temporary deformation, or elastic behavior, and those causing failure of the material, or rupture.
Plasticity enables a solid under the action of external forces to undergo permanent deformation without rupture.
Question 2
1 / -0

Rayon is a/an:

A
natural silk

B
artificial silk

C
regenerated fibre

D
none of these

Solution

Rayon is not a naturally occurring silk but manufactured by chemical treatment of a natural material, wood pulp. Rayon is obtained from natural sources yet it is man-made and so, it is called a semi-synthetic (or regenerated) fiber.
Hence, C is the correct option.
Question 3
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Which of the following can absorb over 90% of its own mass of water and also does not stick to wounds?

A
Saran

B
Thiokol

C
Rayon

D
Gun cotton

Solution

Rayon can absorb over 90% of its own mass of water and also does not stick to wounds. Rayon is a manufactured regenerated cellulose fiber. It is made from purified cellulose, primarily from wood pulp, which is chemically converted into a soluble compound.
Question 4
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When plastics are burnt, toxic substances are released into air causing ___________ pollution.

A
water

B
air

C
soil

D
None of these

Solution

When plastics are burnt toxic substances are released into air causing air pollution.
Question 5
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Fibres that are obtained from plants and animals are called

A
natural fibres

B
synthetic fibres

C
plastics

D
none of these

Solution

Fibres obtained from natural sources like plants and animals are known as natural fibres. Examples of natural fibres are wool, silk, etc.
Synthetic fibres and plastics are made by human beings using chemical methods.
Question 6
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___________________ are obtained from cotton plant and sheep respectively.

A
Wool and cotton

B
Cotton and wool

C
Silk and wool

D
Wool and silk

Solution

Cotton is obtained from the fruit of the cotton plants and wool is obtained from sheep.
Hence, option B is correct.
Question 7
1 / -0

Plastics are ____________ in water.

A
highly soluble

B
slightly soluble

C
insoluble

D
sparingly soluble

Solution

Plastics are insoluble in water and it cannot be dissolved in water.
This is because of the non-polar nature of the plastic.
Question 8
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Which of the following is a natural fabric?

A
Polythene

B
PVC

C
Nylon

D
Wool

Solution

Fibres which are obtained from natural sources are called natural fibres.
Example: Cotton, silk, wool etc. Polythene, PVC and nylon are all synthesised by man and are called man-made fibres.

Hence, option $$D$$ is correct.
Question 9
1 / -0

Burning of plastic causes:

A
water pollution

B
air pollution

C
sound pollution

D
All of the above

Solution

Plastics is burnt which releases toxic gases like Dioxins, Furans, Mercury and Polychlorinated Biphenyls into the atmosphere. Further, burning of PolyVinyl Chloride liberates hazardous halogens and pollutes the air, the impact of which is climate change. The toxic substances thus released are posing a threat to vegetation, human and animal health and environment as a whole. These gases cause air pollution only.
Question 10
1 / -0

Raw materials for most of the natural fabrics are obtained from:

A
water

B
earth

C
petroleum

D
sky

Solution

Some of the most common raw materials for the production of natural fabrics are cotton, wool, flax, ramie and wax. Since wax is a petroleum product, $$C$$ is the correct answer.

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Re-Attempt Weekly Quiz Competition

Synthetic Fibres and Plastics Test - 25

Result

Synthetic Fibres and Plastics Test - 25

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SHARING IS CARING

Question 1

Ability to regain its original shape.

Ability to flow when subjected to stress.

Ability to change shape permanently.

Both B and C.

Solution

Question 2

natural silk

artificial silk

regenerated fibre

none of these

Solution

Question 3

Saran

Thiokol

Rayon

Gun cotton

Solution

Question 4

water

air

soil

None of these

Solution

Question 5

natural fibres

synthetic fibres

plastics

none of these

Solution

Question 6

Wool and cotton

Cotton and wool

Silk and wool

Wool and silk

Solution

Question 7

highly soluble

slightly soluble

insoluble

sparingly soluble

Solution

Question 8

Polythene

PVC

Nylon

Wool

Solution

Question 9

water pollution

air pollution

sound pollution

All of the above

Solution

Question 10

water

earth

petroleum

sky

Solution

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