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________________?

Related Mcqs:

1. 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

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. 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

4. 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

5. 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

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. ______________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine?

   A. Epoxy
   B. Amino
   C. Alkyd
   D. Phenolic

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

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

9. 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

10. Condensation polymerisation is not involved in the manufacture of_________________?

    A. Teflon
    B. Polythene
    C. Terylene
    D. Nylon