Previous Year Questions (2014-20) - Polymers Class 12 Notes | EduRev

Chemistry Class 12

Class 12 : Previous Year Questions (2014-20) - Polymers Class 12 Notes | EduRev

The document Previous Year Questions (2014-20) - Polymers Class 12 Notes | EduRev is a part of the Class 12 Course Chemistry Class 12.
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Q.1. Which of the following is a natural polymer?      (2020)
A: polybutadiene 

B: poly (Butadiene-acrylonitrile) 
C: cis-1,4-polyisoprene 
D: poly (Butadiene-styrene)
Ans: 
C
Solution:
Previous Year Questions (2014-20) - Polymers Class 12 Notes | EduRev

Q.2. The biodegradable polymer is:     (2019)
A: Nylon-6,6
B: Nylon-2-Nylon 6
C: Nylon-6
D: Buna-S

Ans: B

Q.3. Regarding cross-linked or network polymers, which of the following statements is incorrect?    (2018)
A: They contain covalent bonds between various linear polymer chains.
B: They are formed from bi-and tri-functional monomers.
C: Examples are bakelite and melamine.
D: They contain strong covalent bonds in their polymer chains.
Ans:
D
Solution:

Cross-linked or network polymers are usually formed from bi-functional & tri-functional monomers and contains strong covalent bond between various linear polymer chains like Melamine, Bakelite etc.

Q.4. Natural rubber has:    (2016)
A: Random cis - and trans-configuration
B: All cis-configuration
C: All trans-configuration
D: Alternate cis - and trans - configuration
Ans: 
B
Solution:

The repeating unit in natural rubber has the cis-configurations with chain extensions on the same side of the ethylene double bond, which is essential for elasticity. If the configuration is trans, the polymer is hard plastic.
Previous Year Questions (2014-20) - Polymers Class 12 Notes | EduRev
All cis-configuration.

Q.5. Biodegradable polymer which can be produced from glycine and aminocaproic acid is:    (2015)
A: Nylon 6, 6
B: Nylon 2 – nylon 6
C: PHBV
D: Buna – N
Ans:
B
Solution:

Nylon-2-nylon-6 or Nylon-2,6 is an alternating polyamide co-polymer of glycine and amino caproic acid.

Previous Year Questions (2014-20) - Polymers Class 12 Notes | EduRev

Q.6. Which of the following organic compounds polymerizes to form the polyester Dacron?   (2014)
A: Terephthalic acid and ethylene glycol
B: Benzoic acid and para HO − (C6H4) − OH
C: Propylene and para HO − (C6H4) − OH
D: Benzoic acid and ethanol
Ans: 
A
Solution:

Previous Year Questions (2014-20) - Polymers Class 12 Notes | EduRev

Q.7. Which one of the following is an example of a thermosetting polymer ?    (2014)
A:

Previous Year Questions (2014-20) - Polymers Class 12 Notes | EduRev
B:

Previous Year Questions (2014-20) - Polymers Class 12 Notes | EduRev
C:

Previous Year Questions (2014-20) - Polymers Class 12 Notes | EduRev
D:

Previous Year Questions (2014-20) - Polymers Class 12 Notes | EduRev
Ans: 
B
Solution:
Bakelite is a thermosetting polymer

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