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Synthetic Fibre...

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  • Question 1
    1 / -0

    Which of the following is not a characteristic of plastics?

  • Question 2
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    Fill in the blanks by picking up the correct words.

    Fibres are materials which are usually thin and have thread-like structure. They are generally classified as ___P___ and ___Q___, on the basis of their origin. Natural fibres may be plant fibres like ___R___ or animal fibres like ___S___.

  • Question 3
    1 / -0

    Sneha has classified a few materials as shown in the table.

    S. No. Material Type/Nature
    1. Nylon Synthetic and non-biodegradable
    2. Jute Natural and non-biodegradable
    3. Coir Synthetic and biodegradable
    4. Wool Natural and biodegradable
    5. Acrylic Blended and biodegradable
    6. Polyester Synthetic and non-biodegradable

    The materials which are classified incorrectly are

  • Question 4
    1 / -0

    A few polymers are grouped together on the basis of some common property as follows:

    Group I: Rayon, acrylic, nylon, jute

    Group II: PVC, melamine, teflon

    Group III: Polycot, terrywool, acrylic Choose the odd one out in group I, II and III

  • Question 5
    1 / -0

    Which of the following applications of plastics show(s) that plastics are bad conductors of electricity?

    I. Refrigerators have an insulating wool of plastics.
    II. Electric wires have a plastic coating.
    III. Chemicals are stored in plastic containers.
    IV. Parachutes are made from plastics.

  • Question 6
    1 / -0

    Read the given passage and fill in the blanks by choosing an appropriate option.

    Cellulose is a naturally occurring fibre. The walls of ___i___ are made of cellulose. It is used in making a synthetic fibre ___ii___ which resembles the most expensive natural fibre ___iii___ in appearance hence, it is also called ___iv___ .

  • Question 7
    1 / -0

    Read the following statements carefully.

    P. I am extensively used in the healthcare industry but my one disadvantage is that I am non-biodegradable.

    Q. I am very familiar form of polyester and used for making bottles, utensils, films, wires, etc.

    R. I am artificial silk and mixed with wool to make carpets. P, Q and R are respectively

  • Question 8
    1 / -0

    Match column I with column II and choose the correct option from the codes given below.

    Column I Column II
    P. Nylon (i) Burns quickly with a smell of burning paper
    Q. Wool (ii) Burns with sooty flame, fabric shrinks and black beads are formed
    R. Acrylic (iii) Shrinks after exposure to flame, forms hard beads and gives a smell of burning hair
    S. Rayon (iv) Burns slowly with a smell of burning hair

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