Peroxide initiated polymerizations occur via -

1. Hydrocarbon combustion 

2. Natural process synthesis

3. Isomeric saponification

4. Free radical chain propagation

Subtopic:  Classification - Methods of Polymerization & Copolymerization |
 89%
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The thermoplastic polymer among the following is -

1. Bakelite

2. Urea-formaldehyde resin

3. PVC

4. Melamine-formaldehyde resin

Subtopic:  Classification - Methods of Polymerization & Copolymerization |
 70%
From NCERT
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The reagent that is used for converting propylene to polypropylene is: 

1. TiCl3 + K/THF

2. TiCl4 + Al(C2H5)3

3. TiCl3 + (CH3)2Mg

4. TiCl4 + CH3(CH2)3Al

Subtopic:  Classification - Methods of Polymerization & Copolymerization |
 82%
From NCERT
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Polyacrylonitrile, characterized by the  repeating unit is made from the monomer: 

1. CH2=CHCN

2. CH3CH2CN

3. HOCH2CH2CH3

4. CH3CH=CHCN

Subtopic:  Classification - Methods of Polymerization & Copolymerization |
 81%
From NCERT
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The monomer used for the manufacture of PVC is obtained by the addition of -

1. Cl2 to ethylene

2. Cl2 to acetylene

3. HCl to ethylene

4. HCl to acetylene in presence of Hg2+ salts

Subtopic:  Classification - Methods of Polymerization & Copolymerization |
From NCERT
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True statements regarding polymers are: 

a. Polymers have a low molecular weight.

b. Polymers have high viscosity.

c. Polymers scatter light.

d. Polymers do not carry any charge.

1. a, b and c

2. a, b and d

3. b, c and d

4. a, c and d

Subtopic:  Polymers: Natural & Synthetic, Biodegradable & Non Biodegradable |
 72%
From NCERT
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The chemical name of 'Melamine' is:

1. l, 3, 5-Triamine-2, 4, 6-triazine

2. 2, 4, 6-Triamine-l, 3, 5-triazine

3. 2-Amino-l, 3, 5-triazine

4. 2, 4-Diamino-l, 3, 5-triazine

Subtopic:  Classification - Methods of Polymerization & Copolymerization |
 55%
From NCERT
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Consider the following sequence of reactions.

The polymer (Y) is -

1. PVC

2. Saran

3. Neoprene

4. Chloroprene

Subtopic:  Classification - Methods of Polymerization & Copolymerization |
From NCERT
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An example of elastomer among the following is: 

1. Dacron

2. Melamine

3. Vulcanized rubber

4. Polystyrene

Subtopic:  Classification - Methods of Polymerization & Copolymerization |
 77%
From NCERT
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Perlon is also known as:

1. Nylon-6, 10

2. Nylon-4, 4

3. Nylon 6, 6, 6

4. Nylon-6

Subtopic:  Classification - Methods of Polymerization & Copolymerization |
 60%
From NCERT
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