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Synthetic Fibres and Plastics Test - 30

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Synthetic Fibres and Plastics Test - 30
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  • Question 1
    1 / -0
    Plastic containers can resist decomposition for:
    Solution
    Plastic is a polymer. Plastics have different types of arrangements in them some plastics have linear types of arrangements while some have branched types of arrangements. So depending upon the type of arrangements of plastics its decomposition time is measured.
    Plastic waste is one of many types of wastes that take too long to decompose. Plastic items can take up to 1000 years or more years to decompose in landfills.

    Option $$C$$ is correct.
  • Question 2
    1 / -0
    Which of the following is known as artificial silk?
    Solution
    Rayon is known as artificial silk because it has properties similar to silk.
  • Question 3
    1 / -0
    Which of the following fiber can be drawn into very fine fibers that can be woven like any other yarn?
    Solution
    $$\text {Terylene}$$ is a popular polyester. It can be drawn into very fine fibers that can be woven like any other yarn.
  • Question 4
    1 / -0
    Which one among the following is a thermosetting plastic?
    Solution
    $$\text {Bakelite is a thermosetting plastic.}$$
    Bakelite is a poor conductor of heat and electricity. It is used for making electrical switches, handles of various utensils, etc. These types of thermosetting plastic which when molded once, can not be softened by heating.
    Hence, the option $$C$$ is correct.
  • Question 5
    1 / -0
    Thermosetting plastics are:
    Solution
    Thermosetting plastics are inelastic, brittle, strong and rigid, strength comes from cross-linking and they do not soluble in organic solvent.

    Hence, option $$D$$ is correct.
  • Question 6
    1 / -0
    Discovery of nylon is associated with:
    Solution
    One of the interpretations is that “nylon” came from “New York” and “London” because two chemists thought up the word on an intercontinental flight from one of the cities to the other.
    So, the answer is option $$A$$.
  • Question 7
    1 / -0
    Polypropylene is not used in:
    Solution
    Polypropylene (PP) is a thermoplastic “addition polymer” made from a combination of propylene monomers. It is used in a variety of applications, like manufacturing, packaging for consumer products, plastic parts for various industries including the automotive industry, special devices like living hinges, and textiles.
    So, option C is correct.
  • Question 8
    1 / -0
    ‘Rayon’  is:
    Solution
    Rayon is known as artificial silk. (Artificial silk or art silk is any synthetic fiber that resembles silk, but typically costs less to produce.)It has properties similar to silk. It was obtained by chemical treatment of wood pulp. It is a man-made fiber. It is cheaper than silk and can be woven like silk fibers.
    Hence, option $$B$$ is correct.
  • Question 9
    1 / -0
    Pick the synthetic fiber out of the following?
    Solution
    The correct answer is B.

    The source of wool is animals. Plants give cotton and jute. Nylon is a synthetic fibre.
  • Question 10
    1 / -0
    Which of the following is not a natural fibre ?
    Solution
    The correct answer is option (C) Nylon.
    Nylon is synthesised with the help of chemicals in factories whereas jute, flax and cotton are natural fibres obtained from plants.
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