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Polymers Test - 26

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Polymers Test - 26
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Weekly Quiz Competition
  • Question 1
    1 / -0
    The abbreviation PDI refers to__________.
    Solution
    The polydispersity index (PDI) is a measure of the distribution of molecular mass in a given polymer sample. The PDI calculated is the weight average molecular weight divided by the number average molecular weight. It indicates the distribution of individual molecular masses in a batch of polymers. The PDI has a value equal to or greater than $$1$$, but as the polymer chains approach uniform chain length, the PDI approaches unity.
  • Question 2
    1 / -0
    Which of the following is coated as a thin layer on the inner side of non-stick pans?
    Solution
    Polytetrafluoroethylene (PTFE) or Teflon is used to make non-stick cookware. Given image explains the formation of PTFE.

  • Question 3
    1 / -0
    In the vulcanization of rubber:
    Solution
    Natural rubber is often vulcanized which is a process by which the rubber is heated and sulfur peroxide or bisphenol are added to improve resistance and elasticity and to prevent it from perishing.
    Option B is correct.

  • Question 4
    1 / -0
    Soft drinks and baby-feeding bottles are generally made of:
    Solution
    Soft drinks and baby-feeding bottles are generally made of polystyrene which is an addition homopolymer with a linear chain-like structure.
     The monomer is styrene.
  • Question 5
    1 / -0
    Polymer formation form monomers starts by:
    Solution
    Polymerization occurs by a condensation reaction, which is a chemical reaction in which two molecules or moieties (functional groups) combine to form a larger molecule, together with the loss of a small molecule such as water, HCl etc.
    Option A is correct.
  • Question 6
    1 / -0
    Which of the following is a co-polymer ?
    Solution
    A polymer derived from more than one species of monomer is a co-polymer e.g. Nylon - $$6,\:6$$. 

    All others are formed by following single monomers: 
    Polytetrafluoroethylene - tetrafluoroethylene, 
    Polyvinyl chloride - vinyl chloride, 
    Polyethylene - ethylene and
     Natural rubber or polyisoprene - isoprene ($$2$$-methyl-$$1,\:3$$-butadiene).
  • Question 7
    1 / -0
    Which one of the following is used to make 'non-stick' cookware?
    Solution
    Polytetrafluoroethylene (PTFE) or Teflon is used to make non-stick cookware. 
    Above given image explains formation of PTFE.

  • Question 8
    1 / -0
    Which of the following is a biodegradable polymer?
    Solution

  • Question 9
    1 / -0
    Which of the following monomers gives the polymer neoprene on polymerisation ?
    Solution
    Neoprene is formed by polymerization of chloroprene as shown:

  • Question 10
    1 / -0
    The commercial name of poly(methyl methacrylate) is:
    Solution
    Poly(methyl methacrylate) (PMMA) is a transparent thermoplastic often used in sheet form as a lightweight or shatter-resistant alternative to soda-lime glass. It has since been sold under many different names, including Acrylite, Lucite, Plexiglas and Perspex.
    Option D is correct.
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