_______________________ is not a condensation polymer ?

Related Mcqs:

1. Melt spinning of polymers involves the forcing of polymer melt through spinnerates (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the _____________ fibres?

   A. Acrylic
   B. Polyester
   C. Nylon 6:6
   D. Polypropylene

2. In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for _______________ fibres?

   A. Polythene
   B. PVC
   C. Rayon
   D. Polyvinyl acetate

3. In a cross linked polymer, the monomeric units are linked together to constitute a three dimensional network. Which of the following is a cross-linked polymer ?

   A. Bakelite (phenol formaldehyde)
   B. Polyester
   C. Polythene
   D. Nylon-6

4. Which of the following is not a condensation polymer ?

   A. Bakelite
   B. Melamine polymer
   C. Poly-methyl-methacrylate (PMMA)
   D. None of these

5. Epoxy resin is a polymer containing two or more groups of the bellow fig. is called epoxide group or ethoxyline group. It is a _______________?

   A. Polyamide & an elastomer
   B. Good adhesive
   C. Surface coating agent
   D. Both B. and C.

6. Cross linked polymers formed from bi-and trifunctional groups in which cross-linkage in three dimensions via few chemical bonding across linear chains occur imparts to the polymer ______________ properties?

   A. Thermoplastic
   B. Thermosetting
   C. Elastometric
   D. Brittleness

7. Viscosity of a polymer solution or melt _________________?

   A. Decreases with increase in molecular weight
   B. Decreases with increase in temperature
   C. Increases with increase in temperature
   D. Does not vary with temperature rise

8. In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher ___________________?

   A. Densities
   B. Melting point
   C. Tensile strength
   D. Hardness, rigidity & brittleness

9. Properties of a polymer is affected by the____________________?

   A. Chain length
   B. Intermolecular forces
   C. Both A. and B.
   D. None of these

10. Which of the following low molecular weight (<104), soft & waxy polymer is used in „chewing gum‟ ?

    A. Cellulose acetate
    B. Polyvinyl acetate
    C. Thiokol
    D. PVC