Teflon is an example of polymer which is a/ an
polyamide
addition polymer
polyester
formaldehyde resin
B.
addition polymer
Teflon is prepared by the combination of a large number of tetrafluoroethylene molecules, without the elimination of any small molecule. Therefore, it is an example of addition homopolymer.
nCF2=CF2 → [-CF2-CF2-]n
Which of the following are addition polymers?
Nylon
Melamine formaldehyde resin
Orlon
All of these
Which one is least reactive in a nucleophilic substitution reaction?
CH3CH2Cl
CH2=CHCH2Cl
CH2=CHCl
(CH3)3CCl
A solution of D-glucose in water rotates the plane of polarised light
to the left
to the right
to either side
None of these
Which of the following pairs give positive Tollen's test?
Glucose, sucrose
Glucose, fructose
hexaual, acetophenone
Fructose, sucrose
Which pair of polymers have similar properties?
Nylon, PVC
PAN, PTFE
PCTFE, PTFE
Bakelite, alkyle resin