Polymers Test

Result

Polymers Test - 46

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following fibre are used for formation of air craft canopies?

A
Nylon

B
Dacron

C
Orlon

D
Terylene

Solution
Question 2
1 / -0

Which fiber is cellulose derivative:

A
Nylon

B
Rayon

C
Wool

D
Polyster

Solution
Question 3
1 / -0

Poly-$$\beta$$-hydroxybutyrate - co-$$\beta$$-hydroxy valerate (PHBV) is a copolymer of:

A
3-hydroxybutanoic acid and 4-hydroxypentanoic acid

B
2-hydroxybutanoic acid and 3-hydroxypentanoic acid

C
3-hydroxybutanoic acid and 2-hydroxypentanoic acid

D
3-hydroxybutanoic acid and 3-hydroxypentanoic acid

Solution
Question 4
1 / -0

Which of the following has cross-linked polymer?

A
Vulcanised rubber

B
Nylon

C
Phenol-formaldehyde resins

D
Both $$A$$ and $$C$$
Question 5
1 / -0

The monomer of the polymer?

A

B
$${ CH }_{ 3 }-CH=CH-{ CH }_{ 3 }$$

C
$${ CH }_{ 3 }-CH={ CH }_{ 2 }$$

D
Question 6
1 / -0

The monomers of Buna-S polymers are:

A
vinyl chloride and vinylidene

B
styrene and butadiene

C
acrylonitrile and butadiene

D
isobutylene and isoprene

Solution

Styrene and butadiene
Because with styrene, rubbers are harder and less rubbery and butadine also influence the property.
Question 7
1 / -0

What percentage of sulphur is used in the vulcanization of rubber?

A
$$5$$%

B
$$3$$%

C
$$30$$%

D
$$55$$%

Solution

$$5$$% of sulphar is used in order to extent the stiffness of valcanised rubber.
Question 8
1 / -0

Which of the following is an example of condensation polymer?

A
Teflon

B
Melamine

C
Nylon-6

D
BUNA-S
Question 9
1 / -0

Which step is the chain propagation step in the above mechanism?

A
$$1$$

B
$$2$$

C
$$3$$

D
$$4$$

Solution
Question 10
1 / -0

If Mw is the weight average molecular weight and Mn is the number average molecular weight of a polymer, the polydispersity index (PDI) of the polymer is given by:

A

$$\dfrac{\overline{M}_n}{M_w}$$

B

$$\dfrac{\overline{M}_w}{\overline{M}_n}$$

C

$$\overline{M}_w \times \overline{M}_n$$

D

$$\dfrac{1}{\overline{M}_w \times \overline{M}_n}$$