Related Questions

Phenol formaldehyde is produced by condensation polymerisation. It is also known as
A Teflon
B Bakelite
C Polyester
D Nylon-66
Condensation polymerisation of formaldehyde with __________ does not produce phenolic resin.
A Resorcinol
B Phenol
C Para-cresol
D Melamine
Melamine formaldehyde resin which has a very high anti tacking properties, is not used for the
A Electrical insulation purpose
B Tanning of leather
C Strengthening of plaster of paris
D Decorative laminates
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
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
Which of the following is produced by condensation polymerisation?
A Bakelite
B Polythene
C Poly vinyl chloride
D Polystyrene
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
Condensation polymerisation of __________ produces bakelite.
A Propylene
B Phenol & formaldehyde
C Phenol & acetaldehyde
D Urea & formaldehyde
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
The heat transfer co-efficient in film type condensation is __________ that for dropwise condensation.
A Greater than
B Lower than
C Is same as
D Half

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