Related Mcqs:

1. Styrene which is a monomer for the production of polystyrene, is commercially produced by the __________________?

   A. Catalytic dehydrogenation of ethyl benzene
   B. Dehydration of ethyl alcohol followed by hydrogenation
   C. Reacting ethylene oxide with acetaldehyde
   D. Fermentation of starch

2. Polystyrene is a light, transparent, thermoplastic material used for making __________________?

   A. Toys and combs
   B. Packaging bags
   C. Non-sticking utensils
   D. Electrical insulation

3. Thermocol is a spongy, porous, rigid or flexible foamed plastic, obtained by blowing gas/air through molten__________________?

   A. Saturated polyester
   B. Polyurethane
   C. Polystyrene
   D. Either B. or C.

4. Polystyrene is a ____________ plastic at room temperature?

   A. Ductile
   B. Brittle
   C. Malleable
   D. None of these

5. Orlan fibre which is used as a wool substitute is __________________?

   A. An amorphous polymer
   B. A natural polymeric fibre
   C. Polyacrylonitrile
   D. Poly-methyl-methacrylate (PMMA)

6. The organic acid monomer in nylon-66 is __________________?

   A. Sebacic acid
   B. Terephthalic acid
   C. Adipic acid
   D. Benzoic acid

7. Chain growth polymerisation is a process, in which the monomers are added in a chain fashion, and it requires an initiator to produce the free radical. An example of chain growth polymerisation products is __________________?

   A. Nylon-66
   B. Teflon
   C. Polyester
   D. Bakelite

8. Phenol formaldehyde __________________?

   A. Employs addition polymerisation
   B. Employs condensation polymerisation
   C. Is a monomer
   D. Is an abrasive material

9. Nylon-66 compared to nylon-6 has __________________?

   A. Lower melting point
   B. More abrasion resistant properties
   C. Higher hardness
   D. All A., B. and C.

10. Most commonly used rubber vulcanisation agent is __________________?

    A. Sulphur
    B. Bromine
    C. Platinum
    D. Alumina