Synthetic Fibres and Plastics Test

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Synthetic Fibres and Plastics Test - 18

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following is NOT true?

A
Thermosetting plastic are bad conductors of heat and electricity.

B
Thermoplastics are good conductor of heat and electricity.

C
Plastic do not get corroded easily.

D
Plastic is also a polymer.

Solution

Thermoplastic polymer can change their properties when heated and cooled. All plastics are bad conductors of heat and electricity.

Option B is correct.
Question 2
1 / -0

Which of the following material take the longest to decompose?

A
Paper

B
Cotton cloth

C
Cardboard

D
Plastic bag

Solution

Decomposition of naturally derived materials such as paper, cardboard and cotton is much faster than plastics, metals and glass. So, plastic would take the longest to decompose amongst the other materials given.
Question 3
1 / -0

A silk saree and a nylon saree, both of same length are put to dry under sun. Which one will dry faster?

A
Silk saree

B
Nylon saree

C
Both will take same time

D
Depends on weather condition

Solution

Nylon has various characteristics like a higher impact resistance, a more rapid moisture absorption, greater elasticity and elastic recovery. Nylon absorbs moisture readily as compared to silk so nylon saree dries up faster than silk saree in the sun.
Question 4
1 / -0

The fibre that burns completely leaving no residue is:

A
Cotton

B
Acrylic

C
Polyester

D
Polythene

Solution

Cotton is the fibre that bums completely, leaving no residue.
Question 5
1 / -0

Arrange the following fibers in the order of increasing strength:
Nylon, Cotton, Wool, Polyester, Silk

A
Silk, Wool, Cotton, Nylon, Polyester

B
Wool, Silk, Cotton, Nylon, Polyester

C
Cotton, Silk, Wool, Nylon, Polyester

D
Nylon, Cotton, Silk, Wool, Polyester

Solution

Tensile strength of polymer increases with an increase in chain length and crosslinking of polymer chains.

According to this, the tensile strength of wool < silk < cotton < nylon < polyester.

Artificial fibers like nylon and polyester are designed specially to have more tensile strength.
Question 6
1 / -0

An example of thermosetting plastic, which is also a poor conductor of electricity, is:

A
polythene

B
bakelite

C
polyester

D
PVC

Solution

Bakelite is an example of thermosetting plastic which is also a poor conductor of electricity. Due to its insulating character, it is used for switches and other electrical insulators.
Option B is correct.
Question 7
1 / -0

A person should not wear polyester clothes while cooking in the kitchen because:

A
polyester clothes absorb sweat easily

B
they catch fire easily

C
they are uncomfortable to wear

D
they don't look nice

Solution

Polyester takes longer to catch fire than cotton or linen, but when it does ignite, it melts. When the gluey substance reforms, it can stick to your epidermis. Melting fabric can be extremely dangerous, because it can cause scalding burns above and beyond direct fire damage

Hence, the correct option is $$\text{B}$$
Question 8
1 / -0

Name the plastic used for making non-stick pans :

A
PVC

B
Teflon

C
Bakelite

D
Melamine

Solution

Teflon is used to make non stick pans as it is not affected by heat and oil doesnot stick to it.
Question 9
1 / -0

Use of plastic bags should be avoided because:

A
plastic is non-biodegradable

B
plastic emits toxic gases on burning

C
both $$A$$ and $$B$$

D
none of these

Solution

Use of plastic bags should be avoided because plastic is non-biodegradable and emits toxic gases on burning.
Question 10
1 / -0

Fill in the blanks by suitable words to make correct statements:
_______ is an artificial fibre resembling silk.

A
Rayon

B
Nylon

C
Terylene

D
PET

Solution

Rayon is an artificial fiber resembling silk. Rayon is a synthetic fiber, made from natural sources of regenerated cellulose, such as wood and related agricultural products.

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Re-Attempt Weekly Quiz Competition

Synthetic Fibres and Plastics Test - 18

Result

Synthetic Fibres and Plastics Test - 18

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SHARING IS CARING

Question 1

Thermosetting plastic are bad conductors of heat and electricity.

Thermoplastics are good conductor of heat and electricity.

Plastic do not get corroded easily.

Plastic is also a polymer.

Solution

Question 2

Paper

Cotton cloth

Cardboard

Plastic bag

Solution

Question 3

Silk saree

Nylon saree

Both will take same time

Depends on weather condition

Solution

Question 4

Cotton

Acrylic

Polyester

Polythene

Solution

Question 5

Silk, Wool, Cotton, Nylon, Polyester

Wool, Silk, Cotton, Nylon, Polyester

Cotton, Silk, Wool, Nylon, Polyester

Nylon, Cotton, Silk, Wool, Polyester

Solution

Question 6

polythene

bakelite

polyester

PVC

Solution

Question 7

polyester clothes absorb sweat easily

they catch fire easily

they are uncomfortable to wear

they don't look nice

Solution

Question 8

PVC

Teflon

Bakelite

Melamine

Solution

Question 9

plastic is non-biodegradable

plastic emits toxic gases on burning

both $$A$$ and $$B$$

none of these

Solution

Question 10

Rayon

Nylon

Terylene

PET

Solution

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