Polymers Test

Result

Polymers Test - 59

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

The monomer $$\left(G = Me \ or \ Cl\right)$$ when treated with Zieglar - Natta catalyst undergo polymerisation as shown in the figure. Which of the following statement is not true considering the process given above?

A
The general class of polymer formed is known as homopolymer

B
The polymer obtained is stereoregular

C
Buna-N can be prepared using above process

D
Synthetic rubber can be formed by above process using $$1,3$$ - butadiene

Solution

The polymerisation reaction given above uses only one monomer. Hence, the general class of polymer formed is homopolymer.
Stereoregulars are polymers having an ordered arrangement of pendant groups along the chain. The stereoregularity of the polymer is determined by the catalyst used to prepare it. Using Zieglar-Natta catalyst, polymer obtained is stereoregular.
Synthetic rubber can also be formed by the given process using the monomer 1, 3-butadiene.
Buna-N can not be prepared using given process. Buna-N is formed by polymerization of Styrene and Butadiene.
So, A, B and D are correct statements, and C is incorrect option.
Hence, the correct option is C.
Question 2
1 / -0

Which one of the following is prepared using only one type of material ?

A
Polycot

B
Polywool

C
Terrycot

D
Polyester

Solution

Polyester is a polymer that is made using only one type of material. It is a synthetic derived from coal, air, water and petroleum. The fibres are formed from the reaction between acid and alcohol.

In this $$2$$ or more molecules combine to form a molecule whose structure repeats throughout the length.

Hence, option D is correct.
Question 3
1 / -0

Which of the following statements is not true?

A
Silk is a protein

B
Polyurethane foams are used for making pillows

C
HDPE is prepared by Ziegler Natta polymerization

D
Viscose fabric is not made from cellulose

Solution

Silk is a protein. The protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons.

Polyurethane foams are used for making pillows because of its viscosity and density.

Ziegler-Natta organometallic catalyst (titanium compounds with an aluminium alkyl) is important because it allows one to make polymers of specific tacticity. High-density polyethene is prepared by Ziegler Natta polymerisation.

Viscose fabric is a type of rayon fiber that is made from natural sources such as wood and agricultural products that are regenerated as cellulose fiber. The molecular structure of natural cellulose is preserved in the process.

The statement given in option D is incorrect.

Hence, option D is the answer
Question 4
1 / -0

The polymer obtained with methylene bridges by condensation polymer is:

A
PVC

B
Buna-S

C
Polyacrylonitrile

D
Bakelite

Solution
Question 5
1 / -0

The natural rubber is the polymer of

A
1,3-butadiene

B
Polyamide

C
Isoprene

D
None of these

Solution
Question 6
1 / -0

Identify from the above monomers which undergo condensation polymerization.

A
3, 5

B
1, 3

C
1, 6

D
2, 4
Solution
3 and 5 are addition polymers:
Addition polymers form:
- When unsaturated carbon (organic) molecules react to form a long chain polymer molecule
- No small molecules or atoms are eliminated during the reaction chloroethene (vinyl chloride) $$CH_2=CHCl$$ monomer forms polymer polyvinyl chloride (PVC) $$-[-CH_2-CHCl-]n- $$ (Tetrafluoroethene (tetrafluoroethylene))
$$CF_2=CF_2$$ monomer forms polymer polytetrafluorethene (polytetrafluoroethylene, teflon) $$-[CF_2-CF_2-]_n-$$

Condensation polymers form:
When bifunctional monomers react to form a long chain polymer molecule small molecules, such as water, are eliminated during the reaction. Polyesters, polyamides, proteins and polysaccharides such as cellulose, are all examples of condensation polymers.
Example:
terephthalic acid + ethylene glycol gives polyethylene terephthalate (PET, PETE, or terylene or dacron)
$$nHOOC-C_6H_4-COOH + nHO-(CH_2)_2-OH \rightarrow$$
$$ -(-OC C_6H_4-COO-(CH_2)_2-O-)n- + (2n-1)H_2O $$
Question 7
1 / -0

Formation of polyethylene from calcium carbide taken place as follows:

$$CaC_2+2H_2O\rightarrow Ca(OH)_2+C_2H_2$$
$$C_2H_2+H_2\rightarrow C_2H_4$$
$$nC_2H_4\rightarrow (CH_2-CH_2)n$$

The amount of polyethylene obtained from 64.0 kg of $$CaC_2$$ is:

A
27 kg

B
24 kg

C
22 kg

D
28 kg

Solution

$$M_{CaC_2}=40 + 2 \times 12=64 g/mol$$,

No. of moles of $$CaC_2$$ in 64 Kg =1000 mole= No. of moles of $$C_2H_2$$ formed= No. of moles of $$C_2H_4$$ formed

Thus n=1000

Amount of polyethylene$$= 28\times 1000= 28000\ g= 28\ kg$$
Question 8
1 / -0

The polymer used as packaging material in orthopaedic devices and for controlled drug release is:

A
Kevlar

B
PHBV

C
Glyptal

D
Bakelite

Solution

PHBV [Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)] find its applications in controlled release of drugs, medical implants and repairs, speciality packaging, orthopaedic devices and manufacturing bottles for consumer goods.
Hence, the correct option is $$B$$
Question 9
1 / -0

The structure of the polymer obtained by the following reaction is:

A
I

B
II

C
III

D
IV

Solution
Question 10
1 / -0

The monomers used in preparation of dextron are:

A
lactic acid and glycolic acid

B
3-hydroxy butanoic acid and 3-hydroxy pentanoic acid

C
styrene and 1, 3-butadiene

D
hexamethylenediamine and adipic acid

Solution

The monomers used in the preparation of dextron are lactic acid and glycolic acid. Dextron is a copolymer and has ester linkage.

Hence, option A is correct.