Related Questions

Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals.
A Organic peroxides
B Sulphuric acid
C Hydroflouric acid
D None of these
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
Condensation polymerisation is not involved in the manufacture of
A Teflon
B Polythene
C Terylene
D Nylon
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
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
Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about __________ ° C.
A -20
B 50
C 250
D 500
Which of the following is produced by addition polymerisation?
A Polybutadiene
B Phenol formaldehyde
C Urea-formaldehyde
D Dacron
If 15 men working independently and at the same rate can manufacture 27 baskets in an hour, how many baskets would 45 men working independently and at the same rate manufacture in 40 minutes?
A 27
B 35
C 40
D 54
If 15 men working at the same rate can manufacture 27 baskets in an hour, how many baskets would 45 men manufacture in 40 minutes?
A 27
B 54
C 35
D 40
Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture.
A CaO
B MnO2
C ZnO
D FeS

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