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Organic Chemistry C. Polymer

📆 October 23, 2024

Total Questions: 37

21. Which one of the following polymers is widely used for making bulletproof material? [U.P. U.D.A./L.D.A. (Mains) 2010]

Correct Answer: (b) Polyamides
Solution:Kevlar is a material commonly used to make bulletproof vests. Kevlar is a para-aromatic polyamide (Poly-Paraphenylene Terephthalamide) synthetic fiber. It contains lots of inter-chain bonds which make it extremely strong. Layers of laminated glass are also used for making bulletproof materials.

22. Which one of the following polymers is used for making bullet-proof windows? [U.P.P.C.S. (Pre) 2015]

Correct Answer: (a) Polycarbonates
Solution:Bullet-resistant glass is made or manufactured by using polycarbonate, thermoplastic, and layers of laminated glass. It can be used in making bulletproof jackets.

23. Which one of the following is used in making Bullet-proof Jacket?

Correct Answer: (d) Laminated glass
Solution:Bullet-resistant glass is made or manufactured by using polycarbonate, thermoplastic, and layers of laminated glass. It can be used in making bulletproof jackets.

24. Which one of the following polymers are used for making bulletproof materials? [U.P.P.C.S. (Mains) 2017]

I. Kevlar
II. Glyptal
III. Lexan

Select the correct answer using the codes given below:
Code:

Correct Answer: (c) I and III
Solution:Kevlar (polyamide) is best known for its use in ballistic and stab-resistant body armour, and Lexan (polycarbonate) is used for making bulletproof materials. Glyptal is a condensation polymer which is used in the manufacturing of paints and lacquers (protective coating for woods, metals).

25. Consider the following statements: [U.P.P.C.S. (Pre) 2003, U.P. U.D.A./L.D.A. (Pre) 2002]

  1. Teflon and Dacron are polymers.
  2. Neoprene is synthetic rubber.
  3. Polythene is polyethylene polymer.
  4. Natural rubber is chloroprene.

Which of the above statements are correct?

Correct Answer: (a) 1, 2, and 3
Solution:Natural rubber is a polymer of 'Isoprene' which is obtained as a latex from rubber trees, Rubber obtained from an artificial of synthetic rubbers that are produced by polymerization of source is known as synthetic rubber. Neoprene is a family chloroprene. Teflon and Dacron are examples of polymers. Polythene or polyethylene is a polymer of ethylene.

26. A polymer used for making nonstick surface coating for utensils is – [U.P.P.C.S. (Spl.) (Mains) 2008]

Correct Answer: (b) Teflon
Solution:Polytetrafluoroethylene (PTFE) is usually known as Teflon. PTFE is a solid fluorocarbon. Its density is 2.2 g/cm³ and its melting point is 327°C. This is especially used for making non-stick surface coating for utensils.

27. Which one of the following polymers is used for the production of non-stick pans? [U.P.P.C.S. (Pre) 2015]

Correct Answer: (a) Teflon
Solution:Polytetrafluoroethylene (PTFE) is usually known as Teflon. PTFE is a solid fluorocarbon. Its density is 2.2 g/cm³ and its melting point is 327°C. This is especially used for making non-stick surface coating for utensils.

28. Non-stick frying pans are coated with – [Jharkhand P.C.S. (Pre) 2016]

Correct Answer: (b) Teflon
Solution:Polytetrafluoroethylene (PTFE) is usually known as Teflon. PTFE is a solid fluorocarbon. Its density is 2.2 g/cm³ and its melting point is 327°C. This is especially used for making non-stick surface coating for utensils.

29. What is Teflon? [Jharkhand P.C.S. (Pre) 2010]

Correct Answer: (a) Fluorocarbon
Solution:Polytetrafluoroethylene (PTFE) is usually known as Teflon. PTFE is a solid fluorocarbon. Its density is 2.2 g/cm³ and its melting point is 327°C. This is especially used for making non-stick surface coating for utensils.

30. Teflon is a polymer of which of the following monomers? [60th to 62nd B.P.S.C. (Pre) 2016]

Correct Answer: (a) Tetrafluoroethylene
Solution:Polytetrafluoroethylene, commonly known as Teflon, is a polymer of tetrafluoroethylene.
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