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Chemical Engineering :: Polymer Technology

  1. Condensation polymerisation of formaldehyde with __________ does not produce phenolic resin.

  2. A.
    resorcinol
    B.
    phenol
    C.
    para-cresol
    D.
    melamine

  3. Pick out the wrong statement.

  4. A.
    Polystyrene is a thermoplastic polymer.
    B.
    Protein is a natural polymer.
    C.
    Neoprene is a natural rubber.
    D.
    Polythene is a copolymer, while SBR is a homopolymer.

  5. Neoprene is rendered non-inflammable, because of

  6. A.
    its cross-linked structure.
    B.
    its linear chain structure.
    C.
    the presence of chlorine atoms in its monomer.
    D.
    the absence of chlorine atoms in its monomer.

  7. Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is

  8. A.
    Ni
    B.
    V2O5
    C.
    Fe
    D.
    aluminium triethyl combined with titanium tetrachloride

  9. Phosphates (e.g., triceresyl, tributyl, tetrabutyl, tripheyl etc.) are added to polymers to act as

  10. A.
    hardeners
    B.
    anti-shrinkage agents
    C.
    plasticisers
    D.
    transparency improver

  11. __________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate.

  12. A.
    Fibrous
    B.
    Leathery
    C.
    Rubbery
    D.
    Hard

  13. Which of the following is a natural polyamide fibre.

  14. A.
    Wool
    B.
    Silk
    C.
    Cotton
    D.
    None of these

  15. __________ is a copolymer.

  16. A.
    Nylon-66
    B.
    Polyrophylene
    C.
    PVC
    D.
    Poly tetra flouro ethylene

  17. Polycaprolactum is nothing but

  18. A.
    orlon
    B.
    nylon 6, 6
    C.
    nylon 6
    D.
    saran

  19. Zeigler process

  20. A.
    produces high density polythene.
    B.
    uses no catalyst.
    C.
    produces low density polythene.
    D.
    employs very high pressure.