CBSE
Multiple Choice QuestionsRegarding cross-linked or network polymers, which of the following statements is incorrect?
They contain covalent bonds between various linear polymer chains.
They are formed from bi- and tri-functional monomers.
They contain strong covalent bonds in their polymer chains.
Examples are bakelite and melamine.
Of the following which one is classified as polyester polymer?
Bakelite
Melamine
Nylon-66
Nylon-66
Caprolactam is used for the manufacture of
nylon - 6
Teflon
terylene
terylene
Which one of the following statements is not true?
In vulcanization, the formation of sulphur bridges between different chains make rubber harder and stronger
Natural rubber has the trans-configuration at every double bond
Buna-S is a copolymer of butadiene and styrene
Natural rubber is a 1,4 polymer of isoprene
The structure of some common polymers is given. Which one is not correctly presented?
Teflon
Neoprene
Terylene
Terylene
Polymer formation from monomers starts by
condensation reaction between monomers
coordination reaction between monomers
Conversion of one monomer into other monomers
hydrolysis of monomers
[NH(CH2)NHCO(CH2)4CO]n
co-polymer
addition polymer
thermosetting polymer
thermosetting polymer
Which of the following fibres is made of polyamides?
Dacron
Orion
Nylon
Rayon
The straight chain polymer is formed by
hydrolysis of (CH3)3 SiCl followed by condensation polymerisation
hydrolysis of CH3SiCl3 followed by condensation polymerisation
hydrolysis of (CH2)2Si by the addition of the polymerization
hydrolysis of (CH2)2Si by the addition of the polymerization
Which one of the following polymers is prepared by condensation polymerization?
Nylon - 66
Teflon
Rubber
Rubber
