Q.1
What is the effect of polymer transfer on the polymer product formed by radical polymerization?
  • a) becomes less resistant to foreign agents
  • b) becomes less crystallizable
  • c) becomes mechanically weak
  • d) all of the mentioned
Q.2
Which of the following is the important commercial use of polyvinyl butyral?
  • a) decorative laminates
  • b) film forming technology
  • c) safety glass interlayer
  • d) textile and paper treatment
Q.3
Which of the following types of polymerization is used to produce Polychloroprene commercially?
  • a) emulsion polymerization
  • b) solution polymerization
  • c) bulk polymerization
  • d) all of the mentioned
Q.4
Which of the following additives are used in the least amount with polymer in general?
  • a) cross-linking agents
  • b) fillers
  • c) lubricants
  • d) plasticizers
Q.5
How the viscosity of aromatic polyamide solutions does vary with the increase in volume fraction of polymer formed?
  • a) decreases always
  • b) first decreases then increases
  • c) first increases then decreases
  • d) increases always
Q.6
Which of the following kind of polymer has the highest percentage in polypropylene?
  • a) syndiotactic
  • b) isotactic
  • c) atactic
  • d) all of the mentioned
Q.7
How does degree of polymerization affected with increase in temperature of cationic polymerization reaction?
  • a) cannot be determined
  • b) increases
  • c) decreases
  • d) no change
Q.8
Which of the following compounds is used to control the polymer chain length in emulsion polymerization?
  • a) gelatin
  • b) cetyl alcohol
  • c) buffer solutions
  • d) dodecyl mercaptan
Q.9
Where is the copolymer equation of binary copolymerization not applicable?
  • a) cationic systems
  • b) anionic systems
  • c) free radical systems
  • d) none of the mentioned
Q.10
Which of the following cannot affect the average lifetime of a radical in a photo-initiated polymerization?
  • a) frequency of light radiations
  • b) intensity of light radiations
  • c) rate of polymerization, Rp
  • d) none of the mentioned
0 h : 0 m : 1 s