Bakelite is the condensation polymer of
C6H5OH and caprolactum
HCHO and phthalic acid
C6H5OH and HCHO
HCHO and ethylene glycol
Bisphenol and epichlorohydrin condensed in presence of NaOH forming
Resins
Rubber
Foam
Polyester
Natural rubber is a polymer of monomer isoprene. During polymerisaton
1, 4 addition takes place
1, 2 addition takes place
1,3 addition takes place
both double bonds are converted into single bond
Select the correct statement
Orlon is an addition polymer
Dacron is an addition polymer
Orlon is a condensation polymer
The monomers of orlon is styrene
Which of the following polymers can be used for lubrication and as an insulator?
SBR
PVC
PTFE
PAN
The hard plastic covers of telephones are made from polymers of
acrylonitrile
styrene
fluoromethane
phenol and formaldehyde
D.
phenol and formaldehyde
Phenol-formaldehyde is used in making covers of telephones. It is made by the reaction of phenol and Formaldehyde.
Step I: Formation of novolac
Step II: On heating above structure, it gives network of phenol and formaldehyde, also known as bakelite.
Which one of the following monomers gives the polymer neoprene on polymerisation?
CH2=CH-Cl
CCl2=CCl2
CH2=CCl-CH=CH2
CF2=CF2