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Synthetic Fibre...

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  • Question 1
    1 / -0

    Which of the following statements is/are correct?

    (I)  Most synthetic fibres are obtained from coal, petroleum and natural gas.
    (II) Acrylic fibres closely resemble wool.
    (Ill) Most synthetic fibres have very high moisture absorbing capacity.
    (IV) Polyester is prepared from cellulose.

  • Question 2
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    Pre-weighed pieces of cloth of nylon, cotton, silk and wool of equal measurements are taken and soaked in a beaker filled with water. After a few minutes, the cloth pieces were taken out of the beaker and weighed again. Which of the following options places them in the correct order of their final weights?

  • Question 3
    1 / -0

    Why is it not advisable to wear clothes made up of synthetic fibres in hot and humid weather?

  • Question 4
    1 / -0

    A brief information about three different plastics is given below :

    X : Thermoplastic which can be rolled into sheets
    V : Thermoplastic which is used as a covering for electric wires.
    Z : Thermosetting which is used for making plugs and switches. Identify X, Y and Z,

  • Question 5
    1 / -0

    Which of the following statements about plastics are true ?

    (i)  All plastics do not have same arrangement of monomer units.
    (ii) Melamine resists fire and can tolerate heat better than other plastics.
    (iii) Plastics with cross-linked monomers are also known.
    (iv) Plastics have limited applications.

  • Question 6
    1 / -0

    Match column I with column II and select the correct answer from the codes given below.

    Column I Column II
    P. A synthetic fibre also called as artificial silk (i) Spandex
    Q. A synthetic fibre also known as lycra (ii) Acrylic
    R. A synthetic fibre that closely resembles wool (iii) Rayon
    S. The first true synthetic fibre (iv) Nylon

  • Question 7
    1 / -0

    Which of the following materials is the best for making garments and jackets that can be used in wet or damp environment?

  • Question 8
    1 / -0

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

    Column I Column II
     Polyester (i) Prepared by using wood pulp
     Teflon (ii) Used for making para chute and stockings
     Rayon (iii) Used for making non-stick cook wares
     Nylon (iv) Fabrics do not wrinkle easily

  • Question 9
    1 / -0

    Choose the correct option for the given statements.

    I. Plastics are generally good conductors of electricity.
    II. Ropes made by bake lite are used in cranes and elevators.
    III. Teflon is a special plastic on which oil and water do not stick.
    IV. Plastic is non-biodegradable, hence not environment friendly.

  • Question 10
    1 / -0

    Read the given statements and mark the appropriate answer.

    Statement 1: Polyester is synthesised from petrochemicals by linking ester units.

    Statement 2: Polyester is a natural fibre.

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