How many initiator fragments are present in the dead polymer formed by combination mode of chain termination?
a) 2
b) 1
c) 3
d) 0
Q.2.
What is the initiator efficiency in chain initiation step of free radical polymerization?
a) fraction of unreacted monomers
b) extent of reaction
c) fraction of radicals actually contributing
d) number of initiator molecules
Q.3.
What is the expression for the rate of chain initiation of free radical chain growth polymerization?
a) fkd[I]
b) 2fkd[I]
c) kd[I]/2
d) kd[I]
Q.4.
The data for bulk chain polymerization having potassium persulfate as initiator is given-
a) 0.012
b) 0.0162
c) 0.05
d) 0.1
Q.5.
What is the rate chain initiation reaction for initiator efficiency of 0.when concentration and decomposition rate of benzoyl peroxide are 4 mol/m3 and 3.24*10-6 mmol-s-respectively?
a) 2.07*10-5
b) 1.57*10-5
c) 3.27*10-5
d) 1.03*10-5
Q.6.
What is the expression for rate of termination reaction of free radical polymerization?
a) kt[M∙]2
b) 2kt[M∙]2
c) 2fkt[M∙]
d) fkt[M∙]
Q.7.
Consider following data for bulk polymerization, with benzoyl peroxide as initiator.
a) 0.7
b) 0.53
c) 0.26
d) 0.82
Q.8.
How does polymerization rate at a given monomer concentration vary, if rate of chain initiation is tripled?
a) doubled
b) tripled
c) increment by factor of 30.5
d) remains constant
Q.9.
Which order kinetics does the rate of polymer formation, in free radical polymerization, follow corresponding to monomer concentration?
a) 1
b) 0
c) 2
d) 3
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