Polymers
7 months ago
gtufaro_67533
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10 QuestionsShow answers
  • Question 1
    30 seconds
    Q.

    A chain of repeating units (called monomers)

    answer choices

    monomer

    dimer

    replicate

    polymer

  • Question 2
    30 seconds
    Q.

    Sodium alginate is

    answer choices

    synthesized in the lab by heating salt in the presence of hydrophobic molecules.

    a natural polymer obtained from kelp and seaweed

    used as a synthetic replacement for salt.

    not a polymer.

  • Question 3
    30 seconds
    Q.

    A polymer made in the laboratory (or industry) usually made from petrochemicals

    answer choices

    nature polymer

    natural polymer

    protein

    synthetic polymer

  • Question 4
    60 seconds
    Q.

    Once formed, it can be heated and reformed over and over again

    answer choices

    thermoset

    thermoplastic

    elastomer

    kevlar

  • Question 5
    20 seconds
    Q.

    Which of the following is a type of natural polymer?

    answer choices

    Sodium Alginate

    poly vinyl acetate

    polystyrene

    polytetrafluoroethylene

  • Question 6
    20 seconds
    Q.

    Which of the following determine the properties of a polymer?

    answer choices

    chemical nature of the monomer

    length of the polymer chain

    how the monomers are joined together

    All of the above

  • Question 7
    900 seconds
    Q.

    The birefringence effect that occurs when a polymer is viewed between two polarizing filters represents the _________________ regions of the polymer.

    answer choices

    Crystalline

    Amorphous

    Cross-Linked

    Branched

  • Question 8
    900 seconds
    Q.

    A thermoplastic polymer will be ______________________.

    below its glass transition temperature.

    answer choices

    soft and flexible

    rigid and brittle

    translucent

    rubbery

  • Question 9
    120 seconds
    Q.

    Which of these is the best example of how the polymer molecules are arranged in Teflon tape?

    answer choices

    none of the above

  • Question 10
    30 seconds
    Q.

    One explanation for Teflon's low coefficient of friction, hydrophobic and biologically inert properties is.

    answer choices

    The electronegativity of Fluorine

    The thin, smooth surface is impossible for another molecule to create a cross-link

    The IMF of the individual monomers in the structure make it difficult for other molecules to bond.

    The highly branched and cross-linked nature of the polymer doesn't create any areas of adhesion for other molecules.

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