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  • Question
  • Vulcanisation of rubber does not increase its


  • Options
  • A. elasticity
  • B. plasticity
  • C. ductility
  • D. none of these

  • Correct Answer
  • plasticity 


  • Polymer Technology problems


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    • 1. Properties of a polymer is affected by the

    • Options
    • A. chain length.
    • B. intermolecular forces.
    • C. branching & cross-linking.
    • D. all (a), (b).
    • Discuss
    • 2. Thermosplastic materials

    • Options
    • A. do not soften on application of heat.
    • B. are heavily branched molecules.
    • C. are solvent insoluble.
    • D. none of these.
    • Discuss
    • 3. The generic chemical name for the class of polymers which are commerically known as nylons is

    • Options
    • A. polyolefins
    • B. polyamide
    • C. polyacrylate
    • D. polyurathane
    • Discuss
    • 4. Poly tetra flouro ethylene (PTFE) is known as

    • Options
    • A. dacron
    • B. teflon
    • C. bakelite
    • D. celluloid
    • Discuss
    • 5. In condensation polymerisation as compared to addition polymerisation

    • Options
    • A. the monomers are unsaturated compounds.
    • B. no co-product is lost.
    • C. the monomers contain two functional groups.
    • D. generally only one monomer is involved
    • Discuss
    • 6. Synthetic rubber

    • Options
    • A. deforms, if stretched to double of its original dimension.
    • B. is brittle at low temperature
    • C. is softer at higher temperature.
    • D. is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases.
    • Discuss
    • 7. Bakelite is

    • Options
    • A. same as polytetra flouro ethylene (PTFE).
    • B. an inorganic polymer.
    • C. same as thermoset phenol formaldehyde.
    • D. not a polymer.
    • Discuss
    • 8. Unbreakable crockeries are made from __________ polymers.

    • Options
    • A. polystyrene
    • B. melamine
    • C. polystyrene
    • D. polyurathane
    • Discuss
    • 9. Condensation polymerisation of caprolac-tum is carried out in the reactor maintained at a temperature of __________ °C for producing nylon-6.

    • Options
    • A. -20 to 25
    • B. 50 to 75
    • C. 100 to 150
    • D. 250-280
    • Discuss
    • 10. In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer?

    • Options
    • A. PTFE
    • B. Buna-S
    • C. PMMA
    • D. Polycaprolactum
    • Discuss


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