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Polymers Test - 15

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Polymers Test - 15
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  • Question 1
    1 / -0
    The following are synthetic polymers except :
    Solution
    Proteins are natural polymers. Rest of them are synthetic polymers. 
    Hence, option D is correct.
  • Question 2
    1 / -0
    Bakelite is formed by:
    Solution
    Bakelite is a thermosetting phenol formaldehyde resin, formed from a condensation reaction of phenol with formaldehyde.

    Hence, option C is correct.
  • Question 3
    1 / -0
    What are polymers?
    Solution
    A polymer is a substance or material consisting of very large molecules, or macromolecules, composed of many repeating subunits. 
     The word polymer comes from the Greek words for “many parts.” Each of those parts is scientists call a monomer (which in Greek means “one part”). Think of a polymer as a chain, with each of its links a monomer. Due to their broad spectrum of properties, both synthetic and natural polymers play essential and ubiquitous roles in everyday life.
  • Question 4
    1 / -0
    Which among the following is a polymer of cellulose?
    Solution
    The cotton-ball part of the cotton plant has a lot of cellulose. Cellulose makes great fibres. Due to cellulose, cotton fibres can be twisted into thread and woven into cloth. Cotton fibres are even found in some fancy kinds of paper, and that makes the paper feel more cloth-like.
  • Question 5
    1 / -0
    What are blended fibres?
    Solution
    Blended fibres are made by combining various fibres to enhance the property of the product. For eg: spandex and cotton is a natural mix for sports clothing and undergarments to improve stretching properties and prevent odour. A blended fabric helps overcome the disadvantages of natural and synthetic fibre.
  • Question 6
    1 / -0
    Which is used in making of thermocol ?
    Solution
    Polystyrene is used to make disposal plastic such as thermocol.

    Option C is correct.
  • Question 7
    1 / -0
     Which of the following kind of polymers are known for their high crystallinity?
    Solution
    There is high steric regularity in isotactic polymers which fosters close packing of molecular chains. Thus, they are highly crystalline.
  • Question 8
    1 / -0
    Polyacrylamide gel is prepared by mixing acrylamide and ______________ at fixed proportions.
    Solution
    $$\text{Polyacrylamide gel= Acerylamide+Bisacrylamide.}$$
  • Question 9
    1 / -0
    A polymer is formed by :
    Solution
    A polymer is formed by Dehydration synthesis means removal of water molecule.
    So answer is option D.
  • Question 10
    1 / -0
    Emulsions of polyvinyl acetate are used in ?
    Solution
    Answer:- (D) Latex paints
    Explanation:-
    Polyvinyl acetate is synthesized by the emulsion polymerization of vinyl acetate monomer (VAM). Polyvinyl acetate serves as the film-forming ingredient in water-based (latex) paints.
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