JEE Main Previous Year Papers Questions of Chemistry with Solutions are available at eSaral. Practicing JEE Main chapter wise questions of Chemistry will help the JEE aspirants in realizing the question pattern as well as help in analyzing weak & strong areas.
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Previous Years AIEEE/JEE Main Questions
[AIEEE-2009]
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.
(1) natural rubber (2) teflon (3) nylon 6, 6 (4) polystyrene [AIEEE-2010]
(1) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CHO}$ (2) $\mathrm{CH}_{3} \mathrm{CHO}$ (3) HCHO (4) HCOOH [AIEEE-2011]
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.
(1) BuLi (3) HNO $_{3}$ (4) $\mathrm{AlCl}_{3}$ [AIEEE-2012]
Electron – deficient species (Lawis acid) like $\mathrm{AlCl}_{3}, \mathrm{BF}_{3}$ etc. are is used as initiator for cationic polymerisation.
(1) Teflon (2) Acrylonitrile (3) Dacron (4) Neoprene [JEE-Main 2014]
[JEE-Main(Online) – 2015]
(1) Polypropene (2) Poly vinyl chloride (3) Bakelite (4) Glyptal [JEE- Main – 2015]
(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]
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
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]
technique ? (1) Terylene (2) Teflon (3) Nylon 6,6 (4) Melamine polymer [JEE Main (Online) 2016]
[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]
