Lakshesh Verma Lakshesh Verma

Lecture 2 : Advantages of plastics; Disadvantages of plastics & Fibrous materials in use

  • SYNTHETIC FIBRES AND PLASTICS Assignments 1

    Why is it not advisable to burn plastic and synthetic fabrics?

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  • SYNTHETIC FIBRES AND PLASTICS Assignments 2

    Plastic is used for making a large variety of articles of daily use
    and these articles are very attractive. But it is advised to avoid
    the use of plastic as far as possible. Why?

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  • SYNTHETIC FIBRES AND PLASTICS Assignments 3

    A synthetic fibre which looks like silk is obtained by chemical
    treatment of wood pulp. It is, therefore, known as artificial silk.
    What is its common name?

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  • SYNTHETIC FIBRES AND PLASTICS Assignments 4

    Cotton is a natural polymer. What is its chemical name?

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  • SYNTHETIC FIBRES AND PLASTICS Assignments 5

    Describe an activity to show that thermoplastic is a poor conductor of electricity.

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  • SYNTHETIC FIBRES AND PLASTICS Assignments 6

    Manufacturing synthetic fibres is actually helping conservation of forests'. Comment.

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  • SYNTHETIC FIBRES AND PLASTICS Assignments 7

     Match the terms of column A correctly with the phrases given in column B.

    A
    B
    (i) Polyester (a) Prepared by using wood pulp
    (ii) Teflon (b) Used for making parachutes and stockings
    (iii) Rayon (c) Used to make non-stick cookware
    (iv) Nylon (d) Fabrics do not wrinkle easily

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  • SYNTHETIC FIBRES AND PLASTICS Assignments 8

    'Avoid plastics as far as possible'. Comment on this advice.

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  • SYNTHETIC FIBRES AND PLASTICS Assignments 9

    Should the handle and bristles of a tooth brush be made of the same material? Explain your answer.

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  • SYNTHETIC FIBRES AND PLASTICS Assignments 10

    Give examples to show that plastics are non-corrosive in nature.

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  • SYNTHETIC FIBRES AND PLASTICS Assignments 11

    Rana wants to buy shirts for summer. Should he buy cotton shirts or shirts made from synthetic material? Advise Rana, giving your reason.

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  • SYNTHETIC FIBRES AND PLASTICS Assignments 12

    Categorize the materials of the following products into 'can be recycled' and 'cannot be recycled'.
    Telephone instruments, plastic toys, cooker handles, carry bags, ball point pens, plastic bowls, plastic covering on electrical wires, plastic chairs, electrical switches.

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  • SYNTHETIC FIBRES AND PLASTICS Assignments 13

    Explain why the following are made of thermosetting plastics.
    (a) Saucepan handles
    (b) Electric plugs/switches/plug boards

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  • SYNTHETIC FIBRES AND PLASTICS Assignments 14

    Explain the difference between thermoplastic and thermosetting plastics.

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  • SYNTHETIC FIBRES AND PLASTICS Assignments 15

    Explain why plastic containers are favoured for storing food.

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    • Description:-

    Lecture 2:
    Today, we will discuss the last three topics, i.e; Advantages of plastics; Disadvantages of plastics & Fibrous materials in use respectively of Chapter 3 Synthetic Fibres And Plastics.
    Objectives:
    1. Basic concept about Fibrous materials.
    2. Concept of advantages and disadvantages of plastics. 
    Important Tip:
    This lecture is about Advantages of plastics; Disadvantages of plastics & Fibrous materials in use. In this lecture you’ll get to learn about the advantages,  disadvantages and uses of plastics. Also, you’ll get to learn about the topic fibrous material which are commonly used. Have a clear focus on this topic, it help you in further studies also.
    Please go through the topic, their notes. Properly do the assignments, watch videos of the concerned topics. If you have any doubt about any topic/point please submit it in the discussion section... it will be answered as soon as possible.
    After all of this... when you feel confident about the particular topic/chapter then take the quiz.

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