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Polymers Test - 5

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Polymers Test - 5
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Weekly Quiz Competition
  • Question 1
    1 / -0.25

     

    Nylon –2 –Nylon –6 is

     

    Solution

     

     

    They both are biodegradable polymer.

     

     

  • Question 2
    1 / -0.25

     

    Which of the following statements about low density polythene is FALSE?

     

    Solution

     

     

    Low density polythene : It is obtained by the polymerisation of ethene under high presure of 1000-2000 atm. at a temp. of 350 K to 570 K in the pressure of traces of dioxygen or a peroxide initiator (cont). Low density polythene is chemically inert and poor conductor of electricity. It is used for manufacture squeeze bottles. toys and flexible pipes.

     

     

  • Question 3
    1 / -0.25

     

    One of the following is used in speciality packaging, orthopaedic devices and in controlled release of drugs.

     

    Solution

     

     

    PHBV [Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)] find its applications in controlled release of drugs, medical implants and repairs, speciality packaging, orthopaedic devices and manufacturing bottles for consumer goods.

     

     

  • Question 4
    1 / -0.25

     

    Formation of Buna –S, involves polymerization of

     

    Solution

     

     

    Buna S involves the polymerization of 1, 3 butadiene and styrene.

     

     

  • Question 5
    1 / -0.25

     

    In the following reaction, the polymer formed is ?

     

    Solution

     

     

    These monomers form PHBV.

     

     

  • Question 6
    1 / -0.25

     

    Dacron is manufactured by heating a mixture of ethylene glycol and terephthalic acid with one of the Conditions given below.

     

    Solution

     

     

    Dacron is manufactured by heating a mixture of ethylene glycol and terephthalic acid at 420 to 460K in presence of SnO3  as catalyst.

     

     

  • Question 7
    1 / -0.25

     

    Painting material among the following is

     

    Solution

     

     

    Painting material is Gyptal.

     

     

  • Question 8
    1 / -0.25

     

    Which one of the following is  not   a condensation polymer?

     

    Solution

     

     

    The correct answer is Option B.
    Neoprene is not a condensation polymer. It is an additional polymer.
    Neoprene is made from monomer chloroprene (2-chlorobuta-1,3-diene). 
    Dacron, Melamine and Glyptal are condensation polymers.
    Dacron ( also known as terylene) is a polyester made by condensation polymerisation of ethylene glycol and dimethyl terephthalate.
    Glyptal is a copolymer of ethylene glycol and phthalic acid.
    Melamine ( or formaldehyde melamine polymer) is obtained from condensation polymerisation of melamine with formaldehyde.

     

     

  • Question 9
    1 / -0.25

     

    The below molecule is called?

     

    Solution

     

     

    This polymer is polyvinylchloride.

     

     

  • Question 10
    1 / -0.25

     

    In vulcanisarion of rubber,

     

    Solution

     

     

    In vulcanization of rubber sulphur crosslinking is introduced.

     

     

  • Question 11
    1 / -0.25

     

    Bakelite is used for making

     

    Solution

     

     

    Bakelite is used in making electrical switches.

     

     

  • Question 12
    1 / -0.25

     

    The correct name of the polymer below is: 

     

    Solution

     

     

    The correct answer is Option B.
    Novolac
    ->Linear structure formed as a product of condensation reaction between phenol and formaldehyde with excess of phenol.
    ->It is used in paints

     

     

  • Question 13
    1 / -0.25

     

    Rubber tree is found in

     

    Solution

     

     

    Rubber tree is found in India.

     

     

  • Question 14
    1 / -0.25

     

    Which of the following monomers form biodegradable polymers?

     

    Solution

     

     

    Poly-β−hydroxybutyrate co-β− valerate  (PHBV). It is obtained by the copolymerization of  3 −hydroxybutyric acid and  3 −hydroxypentanoic acid. PHBV  is used in specially packaging orthopedic devices and in controlled release of drugs. PHBV  undergoes bacterial degradation in the environment.
    Nylon −2 −. It is an alternating polyamide copolymer of glycine  (H2 ​N −CH2 ​−COOH) and aminocaproic acid  [NH2 ​(CH2 ​)5 COOH] and is biodegradable.

     

     

  • Question 15
    1 / -0.25

     

    Which polymers occur naturally in nature

     

    Solution

     

     

    Starch and cellulose occur naturally.

     

     

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