Q. Buna–N synthetic rubber is a copolymer of :-
[AIEEE-2009]
[AIEEE-2009]
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Sol. (1) Buna-N is actually abbrebiated form, where Bu represents 1, 3-butadiene, Na represents sodium and N represents nitrile (acrylonitrile). Thus, Buna-N is a copolymer of 1, 3-butadiene and acrylonitrile usually copolymer of 1, 3-butadiene, and acrylonitrile usually ploymerise in the presence of sodium.
Q. The polymer containing strong intermolecular forces e.g. hydrogen bonding, is :-
(1) natural rubber
(2) teflon
(3) nylon 6, 6
(4) polystyrene
[AIEEE-2010]
Q. Thermosetting polymer, Bakelite is formed by the reaction of phenol with :-
(1) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CHO}$
(2) $\mathrm{CH}_{3} \mathrm{CHO}$
(3) HCHO
(4) HCOOH
[AIEEE-2011]
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Sol. (3) Bakelite is a thermosetting polymer formed by the condensation reaction of phenol with HCHO in the presense of conc. $\mathrm{H}_{2} \mathrm{SO}_{4}$ It is thus, a cross-linked polymer in which condesation takes place at O- and p- positions So HCHO is the corerect option.
Q. The species which can best serve as an initiator for the cationic polymerization is :-
(1) BuLi
(3) HNO $_{3}$
(4) $\mathrm{AlCl}_{3}$
[AIEEE-2012]
(3) HNO $_{3}$
(4) $\mathrm{AlCl}_{3}$
[AIEEE-2012]
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Sol. (4) Electron – deficient species (Lawis acid) like $\mathrm{AlCl}_{3}, \mathrm{BF}_{3}$ etc. are is used as initiator for cationic polymerisation.
Q. Which one is classified as a condensation polymer?
(1) Teflon
(2) Acrylonitrile
(3) Dacron
(4) Neoprene
[JEE-Main 2014]
Q. Which one of the following structures represents the neoprene polymer :-
[JEE-Main(Online) – 2015]
[JEE-Main(Online) – 2015]
Q. Which polymer is used in the manufacture of paints and lacquers ?
(1) Polypropene
(2) Poly vinyl chloride
(3) Bakelite
(4) Glyptal
[JEE- Main – 2015]
Q. Which of the following statements about low density polythene is FALSE ?
(1) It is used in the manufacture of buckets, dust-bins etc.
(2) Its synthesis requires high pressure
(3) It is a poor conductor of electricity
(4) Its synthesis requires dioxygen or a peroxide initiator as a catalyst.
[JEE Main 2016]
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Sol. (1) Low density polythene : It is obtained by the polymerisation of ethene under high presure of 1000-2000 atm. at a temp. of 350 K to 570 K in the pressure of traces of dioxygen or a peroxide
Q. Assertion : Rayon is a semisynthetic polymer whose properties are better than
natural cotton.
Reason : Mechanical and aesthetic properties of cellulose can be improved by acetylation.
(1) Both assertion and reason are incorrect
(2) Assertion is incorrect statement, but the reason is correct
(3) Both assertion and reason are correct, but the reason is not the correct explanation for the
assertion
(4) Both assertion and reason are correct, and the reason is the correct explanation for the assertion
[JEE Main (Online) 2016]
Q. Which of the following polymers is synthesized using a free radical polymerization
technique ?
(1) Terylene
(2) Teflon
(3) Nylon 6,6
(4) Melamine polymer
[JEE Main (Online) 2016]
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Sol. (2) [esquestion] The formation of which of the following polymers involves hydrolysis reaction ? (1) Nylon 6 (2) Bakelite (3) Nylon 6, 6 (4) Terylene #tag# [JEE – Main 2017]
Helpful..
All q are too good and this hell me to understand theory also.
Add more questions
Upload more questions pleasee….good app for revision mains concepts
noice
thank god …i answered all the questions 🥵
thanks
Thank you sir but please upload more questions
Thanks
Namrta
tnks so much sir add some more questions
soon
Rest is good.
Keep it up!
Anul
*Rest
Please upload the test too!
Boobs are nice
Somewhat better….waste of time!
Waste Of time….. latest questions aren’t present
Ok..good..
some what better…………
waste of time…………………………………………………..
nylon-6 is the answer to “jee main 2017 question’ in the solution of last question
it is Nylon 6,6
nice work from your team
keep it up.
Nice
Great compilation!!
Informative.