Polymers Test

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Polymers Test - 16

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following monomers are unsuitable for condensation polymerization?

A
hydroxy acids

B
butane-dioic acid and glycol

C
diamines and dicarboxylic acids

D
propanoic acid and ethanol

Solution

Propanoic acid and ethanol, both are monofunctional monomers $$ CH_3-CH_2- OH , CH_3-CH_2COOH$$ which are not suitable for a polycondensation reaction to take place because once they combine by condensation polemerisation further polymerisation is not possible.
Question 2
1 / -0

Which compound is condensation polymer?

A
Nylon

B
PVC

C
Natural

D
Teflon

Solution

Teflon is a condensation polymer.
Question 3
1 / -0

Of the following which one is classified as polyester polymer?

A
Terylene

B
Backelite

C
Melamine

D
Nylon-66

Solution

Polyester polymers are a type of polymers in which monomer units are attached to each other by the ester linkage. Polyester is also known as Terylene which is made by (ethyleneterapthalate) benzene 1,4-dicarboxylic acid and ethene 1.4 diol, by condensation polymerisation as :
$$C_6H_4(COOH)_2 + HO-CH_2-CH_2-OH\rightarrow -(OC-ph-O CH_2-CH_2 -O)-_n$$
Question 4
1 / -0

What is the monomer unit of natural rubber?

A
Isoprene

B
Ethene

C
Neoprene

D
Tetrafluro ethene

Solution

Isoprene (2-Methylbuta-1,3-diene) is the monomer unit of natural rubber.
Question 5
1 / -0

Plastics are:

A
salts

B
acids

C
polymers

D
solvents

Solution

Plastics are polymers formed from small molecular fragments which are known as monomers and plastic is the macromolecular fragment.
All polymers are not plastics but all plastics are polymers.
Question 6
1 / -0

The monomer of the polystyrene polymer is:

A
$${CH}_{3}CH=CH{CH}_{3}$$

B
$${CH}_{3}CH={CH}_{2}$$

C
$${({CH}_{3})}_{2}=C{({CH}_{3})}_{2}$$

D
None of the above

Solution

monomer is styrene
Question 7
1 / -0

Which of the following alkene gives four monochloro (structural isomer)products after hydrogenation

A
$$Pent-2-ene$$

B
$$2-Methylbut-2-ene$$

C
$$3-Methylhex-2-ene$$

D
$$2,3-Dimethylbut-2-ene$$

Solution
Question 8
1 / -0

Which of the following is monomer of Nylon-$$6$$?

A

B

C

D

Solution

Nylon-6 is obtained from the polymerization of $$\epsilon$$-Carpolactam.
Question 9
1 / -0

Which of the following polymers of glucose is stored by animals?

A
Cellulose

B
Amylose

C
Amylopectin

D
Glycogen

Solution

Glycogen is stored by the animals,
The carbohydrates are stored in the animal body as glycogen. It is also known as animal starch because its structure is similar to amylopectin and is rather more highly branched. It is present in the liver, muscles, and brain.
Question 10
1 / -0

The formula for calculating $$\bar{M_{w}}$$ of a polymer is:

A
$$\frac{\sum NiMi}{\sum Ni}$$

B
$$\frac{\sum NiMi}{\sum Mi}$$

C
$$\frac{\sum NiMi^{2}}{\sum Mi}$$

D
$$\frac{\sum NiMi^{2}}{\sum NiMi}$$

Solution

$$\bar{M_{W}}$$ is the mass average molecular mass of a polymer, which is calculated as the ratio of total mass of groups of molecules having different molecular masses multiplied with their respective molecular mass to the the total mass of all the molecules.
Therefore, $$\bar{M_{W}}=$$ $$\frac{\sum NiMi^{2}}{\sum NiMi}$$.