Related Mcqs:

1. Addition polymerisation takes place either by a free radical mechanism or ionic mechanism depending on the reagents used. Free radical polymerisation is catalyzed by _______________, which decompose to give free radicals?

   A. Organic peroxides
   B. Sulphuric acid
   C. Hydrofluoric acid
   D. None of these

2. 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

3. 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

4. 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

5. 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

6. Polymerisation process in which two or more monomers of chemically different nature take part is called__________________?

   A. Copolymerisation
   B. Addition polymerisation
   C. Chain polymerisation
   D. None of these

7. Polymerisation of poly functional monomers produces polymers having_________________?

   A. Good mechanical strength
   B. Low viscosity
   C. Low melting point
   D. None of these

8. ____________ of SBR is adversely affected, if more quantity of styrene is added to butadiene during its co-polymerisation to produce SBR?

   A. Percent elongation
   B. Resilience
   C. Freezing point
   D. Strength

9. 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

10. Condensation polymerisation of formaldehyde with _____________ does not produce phenolic resin?

    A. Resorcinol
    B. Phenol
    C. Para-cresol
    D. Melamine