Related Mcqs:

1. Which of the following polymers are produced by employing all bulk polymerisation, solution polymerisation & suspension polymerisation technique of addition (chain) polymerisation ?

   A. PVC
   B. Bakelite
   C. PTFE
   D. Epoxy resin

2. SBR is produced by the copolymerisation of butadiene & styrene by employing emulsion polymerisation. The weight ratio of styrene and butadiene is maintained at_________________?

   A. 1: 3
   B. 3 : 1
   C. 1 : 2
   D. 2 : 1

3. Molecular weight of a polymer is equal to the molecular weight of the repeat unit multiplied by the degree of polymerisation. What is the molecular weight of poly vinyl chloride (PVC), if its degree of polymerisation is 800 ?

   A. 50000
   B. 51600
   C. 49200
   D. 50800

4. 90% of the caprolactam is converted to nylon-6 on its condensation polymerisation in the reactor maintained at a temperature of _____________ °C?

   A. -5
   B. 10-30
   C. 250-280
   D. 500-600

5. Condensation polymerisation of caprolactam is carried out in the reactor maintained at a temperature of __________ °C for producing nylon-6?

   A. -20 to 25
   B. 50 to 75
   C. 100 to 150
   D. 250-280

6. In step growth polymerisation, generally only one type of reaction & some basic mechanism is involved. Step growth polymerisation reaction is not involved in the manufacture of__________________?

   A. Cross linked polystyrene
   B. Phenol formaldehyde resins
   C. Polyesters
   D. Polyamides

7. A chain growth polymerisation reaction consists of three different types of reaction namely initiation reaction, propagation reaction & termination reaction. Chain growth polymerisation reaction is not involved in the manufacture of_______________________?

   A. Siloxane elastomers
   B. Polyamides
   C. Vinyl polymers
   D. Urea-formaldehyde resins

8. Addition of stabiliser during PVC manufacture is done to________________?

   A. Improve its impact strength
   B. Improve its elasticity
   C. Reduce the melt viscosity & glass transition temperature
   D. Prevent its thermal degradation

9. In step growth polymerisation, condensation occurs in a stepwise manner with or without the elimination of smaller molecules. An example of step growth polymerisation product is________________?

   A. Terylene
   B. Polybutadiene
   C. PVC
   D. Polypropylene

10. 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