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?

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. 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

3. 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

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. 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

6. 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

7. Addition polymerisation is not involved in the manufacture of_______________?

   A. Low density polythene
   B. Poly vinyl chloride
   C. Polystyrene
   D. Polyhexamethylene adipamide

8. In condensation polymerisation as compared to addition polymerisation____________________?

   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

9. Polymers are classified into four categories namely thermosetting, thermoplastic, elastomer and fibre depending upon their________________?

   A. Molecular sizes
   B. Magnitude of intermolecular forces
   C. Resistance to heat
   D. Polymerisation mechanism
   Answer: Option B

10. Polymerisation product of C2F4 (carbon tetrafluoride) is called P.T.F.E. (poly chloro tetra fluoro ethylene). It is also called ________________?

    A. Polyurethane
    B. Silicone rubber
    C. Teflon
    D. Epoxy resin