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Polymers Test -...

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  • Question 1
    1 / -0

    The number of $$\pi-$$bonds present in the monomer of polyacrylonitrile is:

  • Question 2
    1 / -0

    List-l                         List-ll                                    
    A)Rayon                   1)$$CH_{2}O+C_{6}H_{5}OH$$


    B)Silicone polymers  2) $$F_{2}C= CF_{2}$$
     
                                                 R
                                                  |
    C) Bakelite              3)  HO-Si-OH
                                                  |
                                                  R
    D) Teflon                     4)Cellulose

  • Question 3
    1 / -0

    a.  $$Caprolactum\: \xrightarrow {hydrolysis} A$$

    b.  $$A + Glycine    \rightarrow B (Polymer) $$

    Here, $$B$$ is :
    I. Condensation Polymer
    II. Addition Polymer
    III. Polyamide Polymer
    IV. Polyester Polymer
    V. Biodegradable Polymer

  • Question 4
    1 / -0

    Which of the following is not a synthetic rubber?

  • Question 5
    1 / -0

    Polymerization in which two or more chemically different monomers take part is called:

  • Question 6
    1 / -0

    Which of the following monomer will make PHBV more flexible?

  • Question 7
    1 / -0

    A : A mixture of raw rubber and sulphur on heating at $$373\:K$$ - $$415\:K$$ gives vulcanised rubber.
    R : ZnO decreases the rate of vulcanisation of rubber.

  • Question 8
    1 / -0

    A : The empirical formula of natural rubber is $$C_{5}H_{8}$$.
    R : Natural rubber contains no conjugate double bonds.

  • Question 9
    1 / -0

    Assertion:
    $$\bar{M_{n}}$$ value is always greater than $$\bar{M_{w}}$$ value for synthetic polymers.

    Reason:
    The mass average molecular weight of the polymer is equal to $$\bar{M_{w}}$$.

  • Question 10
    1 / -0

    Assertion: Natural rubber is all cis-polyisoprene. 

    Reason: trans - polyisoprene cannot be formed.

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