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Synthetic Fibres and Plastics Test - 16

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Synthetic Fibres and Plastics Test - 16
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Given below are two groups of material used to make dress articles. On what basis these have been grouped?
    $$\boxed{\begin{matrix}Jute\\Cotton \end{matrix}}$$ $$\boxed{\begin{matrix}Wool\\Silk \\ Leather\end{matrix}}$$ 
    Solution
    Both the groups belong to natural fiber category but differ in their source of extraction. Jute and cotton are obtained from their respective plants and wool, silk, leather are obtained from animals.
  • Question 2
    1 / -0
    Which of the following statements about nylon fibre is true?
    Solution
    Nylon fibre is strong, elastic, lustrous, and easy to wash. A thread made of nylon fibres is stronger than a steel wire.
  • Question 3
    1 / -0
    Polycot is a mixture of:
    Solution
    Polycot is a fabric that is a mixture of cotton and polyester fibers. They are blended to combine the advantages of both cotton and polyester into one fabric.

    Option $$C$$ is correct.
  • Question 4
    1 / -0
    To which of the following "4R" principle apply most?
    Solution
    $$4R$$ principle was developed for solid waste management and stands for:
    Reduce - the use of non-biodegradable materials,
    Reuse - materials again and again,
    Recycle - use the materials that can be recycled, and
    Recovery - If the waste remains after it is been reused and recycled.

    Plastics are non-biodegradable and take several years to decompose. They adversely affect our ecosystem. Thus, we should avoid plastics as far as possible. Plastics can easily be recycled and reused again.

    The principle $$4R$$ is also applied to all the other options but we chose plastic as our answer because it is the most polluting to our environment. Substances such as natural fibres and metals contribute much less to the damages caused by waste materials.

    Option C is correct.
  • Question 5
    1 / -0
    Which one among the following is a thermosetting plastic?
    Solution
    Plastics that have a cross-linked structure, generally belong to the category of thermosetting plastics. These plastics once moulded, can not be softened by heating. Bakelite is a thermosetting plastic.
    On the other hand, plastics that have a linear structure get deformed easily on heating and can be bent easily. These types of plastics are known as thermoplastics.
    PVC and polyethene belong to the class of thermoplastics.
    Therefore, option C is correct.
  • Question 6
    1 / -0
    PET is a form of:
    Solution
    PET is not a form of nylon, rayon, or acrylic. It is a form of polyester. The full form of PET is polyethylene terephthalate. It is used for making bottles, containers, wires, etc. 

    Hence the correct option is C.
  • Question 7
    1 / -0
    Which of the following can't be decomposed naturally?
    Solution
    All the options mentioned here are non-biodegradable substances. These substances do not break down naturally. When we dispose these, air, moisture, climate, or organisms present in the soil cannot break them down.

    Hence, the correct option is $$\text{D}$$
  • Question 8
    1 / -0
    Which of the following statement is true?
    Solution
    A. Nylon thread is stronger than steel wire because nylon fibre is made up of strong bonds (amide linkages) which give it strength.
    B. Rayon is a regenerated fibre so it is not natural.
    C. Cotton is a polymer of cellulose.
    D. Polyester materials are wrinkle-free.
    Hence, the correct option is A
  • Question 9
    1 / -0
    Which of the following properties of plastic make it most convenient to use?
    Solution
    Plastics are non-reactive at room temperature and others are highly reactive.
    Because of lower density than metals, plastic is light, strong and durable so can be molded in different shapes and sizes easily.
    So all the options are correct, all are properties of plastic.

    Option D is correct answer.
  • Question 10
    1 / -0
    Melamine plastic is used as:
    Solution
    Melamine is a versatile material. It resists fire and can tolerate heat better than other plastics. It is used for making floor tiles, kitchenware, and fabrics that resist fire(or fire-proof fabric).
    The correct option is $$D$$.
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