Q.1
Which of the following is not dependent on result of equilibrium condition of polymerization reaction?
  • a) degree of polymerization
  • b) chain length distribution
  • c) limiting monomer conversion
  • d) none of the mentioned
Q.2
How the increase in temperature to higher values, does affect the equilibrium state of propagation reaction?
  • a) shifts forward
  • b) shifts backwards
  • c) remains constant
  • d) none of the mentioned
Q.3
What is the value of overall rate of polymerization at ceiling temperature?
  • a) exceptionally high
  • b) exceptionally low
  • c) zero
  • d) cannot be determined
Q.4
What is the critical temperature Tc called, if ∆Hᵒ and ∆Sᵒ are both negative in radical polymerization?
  • a) ceiling temperature
  • b) floor temperature
  • c) theta temperature
  • d) all of the mentioned
Q.5
What is the critical temperature called, if ∆Hᵒ and ∆Sᵒ are both positive in radical polymerization?
  • a) ceiling temperature
  • b) floor temperature
  • c) theta temperature
  • d) all of the mentioned
Q.6
What is the approximate ceiling temperature of tetrahydrofuran?
  • a) 70ᵒC
  • b) 160ᵒC
  • c) 300ᵒC
  • d) none of the mentioned
Q.7
How does the viscosity of molten sulphur vary near 160ᵒC and above it?
  • a) goes minimum and then rises sharply
  • b) goes maximum and falls rapidly
  • c) remains constant
  • d) cannot be determined
Q.8
Which of the following does not affect the critical temperature, Tc?
  • a) heat of polymerization
  • b) conditions affecting monomer concentration
  • c) reaction medium
  • d) none of the mentioned
Q.9
What does the intersection point of kdp and kp[M] curves give, where kp and kdp are the rate constants of propagation and depropagation reaction, respectively, when kdp and kp[M] are plotted against temperature of reaction?
  • a) critical monomer concentration
  • b) critical ceiling temperature
  • c) kp/kdp
  • d) all of the mentioned
0 h : 0 m : 1 s