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Polymers Test - 31

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Polymers Test - 31
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  • Question 1
    1 / -0
    Which names are associated with PMMA?
  • Question 2
    1 / -0

    Directions For Questions

    Materials and their properties are given in the table below.
    Material CodeHeavyStrongOpaque
    		Conductor of heat/ electricity
    		FlexibleCan be moulded
    MO1x$$\checkmark$$$$\checkmark$$x$$\checkmark$$$$\checkmark$$
    MO2x$$\checkmark$$$$\checkmark$$$$\checkmark$$$$\checkmark$$x
    MO3xxxxx$$\checkmark$$
    MO4$$\checkmark$$$$\checkmark$$xxx$$\checkmark$$
    MO5$$\checkmark$$$$\checkmark$$$$\checkmark$$xxx
    MO6x$$\checkmark$$$$\checkmark$$xxx

    ...view full instructions

    To make gloves for an electrician, the material that is most suitable is rubber. Which material has most similar properties?
    Solution
    $$\text{Material must not be heavy.}$$
    $$\text{Material must be strong enough for long time stability.}$$
    $$\text{Material should be Opaque.}$$
    $$\text{Material must not conduct heat and electricity as precaution is very important.}$$
    $$\text{Material should be flexible so that electrician can work easily.}$$
    $$\text{Material should be malleable i.e. can be moulded.}$$
  • Question 3
    1 / -0
    Strength of synthetic fibre is better during-
    Solution

  • Question 4
    1 / -0
    Nylon is made by:
    Solution

  • Question 5
    1 / -0
    The natural rubber is the polymer of:
    Solution
    The monomer of natural rubber is Isoprene. Polyisoprene, a polymer of isoprene (C5H8) that is the primary chemical constituent of natural rubber.

    The chemical structure of isoprene can be represented as CH2=C(CH3)—CH=CH2.
  • Question 6
    1 / -0
    Adipic acid is used in the preparation of:
    Solution

    Nylon-$$66$$ is a polymer of hexamethylene diamine and adipic acid.

  • Question 7
    1 / -0
    Which polymer among the following does not soften on heating? 
    Solution
    Bakelite is a highly cross-linked thermosetting polymer. It does not soften on heating because it is heat resistant in nature. Remaining other polymers are thermoplastics which gets soften on heating.
    So, answer is A. 
  • Question 8
    1 / -0
    Polymers may also be made up of :
    Solution
    Polymers are made of repeat units derived from natural gas or coal or crude oil. But building block repeat units can sometimes be made from renewable materials such as polylactic acid from corn or cellulosics from cotton linters. Some plastics have always been made from renewable materials such as cellulose acetate used for screwdriver handles and gift ribbon.
  • Question 9
    1 / -0
    Fishing nets are made of
    Solution
    Nylon is strong enough to bear heavy weights, extend and then regain its original shape and length, making it very resourceful in fishing nets and also durable.
  • Question 10
    1 / -0
    The condensation polymer among the following is:
    Solution

    Proteins are polymers of amino acids covalently linked through peptide bonds into a chain. These are formed by removal of water molecule and through condensation reaction.
    PVC, rubber and polyethene are formed  through addition polymerisation.

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