Latex can be coagulated with?

(1) CH2COOH

(2) H2O

(3) CH3OH

(4) All of these

Subtopic:  Classification - Methods of Polymerization & Copolymerization |
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NEET 2023 - Target Batch - Aryan Raj Singh
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In a polymer sample, 30% of molecules have a molecular mass of 20,000, 40% have 30,000, and the rest- 60,000. What is the weight average molecular mass= of the polymer?

(1) 40,300

(2) 30,600

(3) 43,333

(4) 50,400

Subtopic:  Classification - Methods of Polymerization & Copolymerization |
 53%
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NEET 2023 - Target Batch - Aryan Raj Singh
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Which of the following statement is correct?

(1) Vinyon is a copolymer of vinyl chloride and vinyl acetate

(2) Saran is a copolymer of vinyl chloride and vinylidene chloride

(3) butyl rubber in a copolymer of isobutylene and isoprene

(4) all are correct

Subtopic:  Classification - Methods of Polymerization & Copolymerization |
 84%
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NEET 2023 - Target Batch - Aryan Raj Singh
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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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NEET 2023 - Target Batch - Aryan Raj Singh
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To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following polymer can be used for lubrication and as an insulator? 

(1) SBR

(2) PVC

(3) PTFE

(4) PAN

Subtopic:  Polymers: Natural & Synthetic, Biodegradable & Non Biodegradable |
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NEET 2023 - Target Batch - Aryan Raj Singh
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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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NEET 2023 - Target Batch - Aryan Raj Singh
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To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

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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NEET 2023 - Target Batch - Aryan Raj Singh
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To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The number average molecular mass and mass average molecular mass of a polymer are respectively 30,000 and 40,000. The polydispersity index of the polymer is

1. < 1

2. > 1

3. 1

4. 0

Subtopic:  Classification - Methods of Polymerization & Copolymerization |
 65%
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NEET 2023 - Target Batch - Aryan Raj Singh
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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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NEET 2023 - Target Batch - Aryan Raj Singh
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To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following is not correctly matched?

(1) Nylon-6, 6

                                                     O
                                                     ||
NH(CH2)6NHCO(CH2)4Cn

(2) Neoprene

CH2 - C = CH - CH2 -
             |
            Cln

(3) PMMA

(4)Terylene

निम्नलिखित में से कौन सा ठीक से मेल नहीं खाता है?

 

Subtopic:  Polymers: Natural & Synthetic, Biodegradable & Non Biodegradable |
 56%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints