CBSE
Multiple Choice QuestionsWhich ofthe following is true regarding teflon ?
It is a linear, unbranched polymer of tetrafluoro ethylene
It has very high thermal stability
Polymer molecules are associated by strong dipole-dipole attraction
All of the above
Which is not classified as thermoplastics?
Polyethylene
Polystyrene
Bakelite
Neoprene
Assertion: Natural rubber is a polymer of isoprene.
Reason: Isoprene is a pentene.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion : Orlon is used as a synthetic fibre.
Reason : The monomer of orion is vinyl chloride
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion : Teflon is chemically inert substance.
Reason : Chloroform when treated with antimony trifluoride gives teflon.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false
If both assertion and reason are false.
Monomers of nylon 2-nylon 6 are
glycine and amino caproic acid
glycine and caproic acid
hexamethylene diamine and adipic acid
alanine and amino caproic acid.
The polymer obtained by the interaction of ethylene glycol and terephthalic acid is
nylon
dacron
teflon
bakelite
Assertion : 2-Methyl-1, 3-butadiene is the monomer of natural rubber.
Reason : Natural rubber is formed through anionic addition polymerisation.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
Arrange the following monomers in order of decreasing ability to undergo cationic polymerisation.
I. CH2 = CH - C6H4(NO2)
II. CH2 = CH - C6H4(CH3)
III. CH2 = CH - C6H4(OCH3)
I > II > III
II > I > III
III > II > I
I > III > II
The example of condensation polymerisation is :
formaldehyde - metaformaldehyde
acetaldenyde - para acetaldehyde
acetone - mesityl oxide
ethene - polyethene
