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Polymers Test - 54

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Polymers Test - 54
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Which of the following is a common example of fibres?
    Solution
    Nylon-66 is the common example of fibre. Which is a polyamide. The linear polymer chains are held together by H-bonds between NH group of one chain.
  • Question 2
    1 / -0
    Styrene at room temperature is:
    Solution
    At room temperature and pressure, styrene is a clear, colorless liquid that is an important monomer of synthetic rubber.

    Hence, $$B$$ is correct.
  • Question 3
    1 / -0
    A copolymer is:
    Solution
    A copolymer is a polymer formed when two (or more) different types of monomers are linked in the same polymer chain, as opposed to a homopolymer where only one monomer is used. And Styrene butadiene rubber is made up of two monomers, styrene and buta-1,3-diene.
  • Question 4
    1 / -0
    Which of the following is not a polymer?
    Solution
    A polymer is a chemical compound with molecules bonded together in long, repeating chains.
    Silk is a natural protein fiber (polymer) mainly of fibroin which is produced by certain insects.
    The DNA molecule is a polymer of nucleotides. Each nucleotide is composed of a nitrogenous base, a five-carbon sugar (deoxyribose), and a phosphate group.
    Dichlorodiphenyltrichloroethane (DDT), is a crystalline chemical compound and used as an insecticide.
    Starch is a polysaccharide comprising glucose monomers joined in α 1,4 linkages.

    Hence, option $$C$$ is correct.
  • Question 5
    1 / -0
    Which of the following is not a condensation polymer?
    Solution
    PTFE is not a condensation polymer.
  • Question 6
    1 / -0
    Which of the following polymers can be used for lubrication and as an insulator?
    Solution
    PTFF (Play tetrafluoroethene) or Teflon is used for lubrication and as on insulator.
    Teflon is manufactured by heating tetrafluokoethane with a free radical or per sulfate catalyst at high pressures. It has high flexural strength, even in low temperature, high electrical resistance and low  coefficient of friction.

    $$\underset{Tetrafluoro \ ethane}{nCF_2 = CF_2} \xrightarrow[high P]{catalyst} \underset{Tejlon}{-\!\!\![ \ CF_2 - CF_2-\!\!\!]_n}$$

    So, correct option is (C) 
  • Question 7
    1 / -0
    Which of the following is a copolymer?
    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 8
    1 / -0
    $$ \sim\!\! [\!\! \sim NH(CH_2)_6 NHCO(CH_2)_4 CO\sim\!]_n\!\!\!\!\! \!\sim$$ is:
    Solution
    $$ \sim\!\! [\!\! \sim NH(CH_2)_6 NHCO(CH_2)_4 CO\sim\!]_n\!\!\!\!\! \!\sim$$ is formed by the condensation of adipic acid. and hexamethylene diamine. It is a copolymer (a polymer made from more than one type of monomer molecules is referred to as copolymer).
  • Question 9
    1 / -0
    Which of the following is a biodegradable polymer?
    Solution
    Cellulose is a biodegradable polymer.
  • Question 10
    1 / -0
    The material used for making non stick utensils kitchen is : 
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