Related Questions

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
Polymerisation of poly functional monomers produces polymers having
A Good machanical strength
B Low viscosity
C Low melting point
D None of these
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 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
In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer?
A PTFE
B Buna-S
C PMMA
D Polycaprolactum
Fill in the gaps : There is no such thing as chemically pure water ----nature.
A in
B of
C from
D none of these
There is no such things as chemically pure water--- nature.
A in
B of
C from
D none of these
At Uttara High school each student studies exactly one foreign languages. Three-fifth of the students take Spanish and one-fourth of the remaining students take take German. If all of the others take French, What percent of the students take French?
A 10
B 30
C 20
D 25
Which of the following is not a polymer of two monomers?
A Teflon
B Bakelite
C SBR
D None of these

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