Hydrocarbons – JEE Main Previous Year Questions with Solutions
JEE Main Previous Year Papers Questions of Chemistry With Solutions are available at eSaral. Simulator   Previous Years AIEEE/JEE Mains Questions
Q. The main product of the following reaction is [AIEEE-2010]

Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...

Sol. (2)

Q. One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of 44 u. The alkene is :- (1) Ethene (2) Propene (3) 1-Butene (4) 2-Butene [AIEEE-2010]

Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...

Sol. (4)

Q. Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of :- (1) an isopropyl group (2) an acetylenic triple bond (3) two ethylenic double bonds (4) a vinyl group [AIEEE-2011]

Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...

Sol. (4)

Q. Ozonolysis of an organic compound ‘A’ produces acetone and propionaldehyde in equimolar mixture. Identify ‘A’ from the following compounds :- (1) 2-Methyl-1-pentene (2) 1-Pentene (3) 2-Pentene (4) 2-Methyl-2-pentene [AIEEE-2011]

Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...

Sol. (4)

Q. 2–Hexyne gives trans–2–Hexene on treatment with :- [AIEEE-2012]

Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...

Sol. (3)

Q. In the given transformation, which of the following is the most appropriate reagent ? [AIEEE-2012]

Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...

Sol. (2)

Q. The major organic compound formed by the reaction of 1, 1, 1–trichloroethane with silver powder is :- (1) 2-Butyne (2) 2-Butene (3) Acetylen (4) Ethene [Jee-Main offline 2013]

Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...

Sol. (1)

Q. The number and type of bonds in $\mathrm{C}_{2}^{2-}$ ion in $\mathrm{CaC}_{2}$ are: (1) Two $\sigma$ bonds and one $\pi$ – bond (2) Two $\sigma$ bonds and two $\pi$ – bonds (3) One $\sigma$ bond and two $\pi$ – bonds (4) One $\sigma$ bond and one $\pi-$ bond [Jee-Main offline 2014]

Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...

Sol. (3) $\mathrm{Ca}^{+2}[\mathrm{C} \equiv \mathrm{C}]^{-2}$

Q. In the hydroboration – oxidation reaction of propene with diborane, $\mathrm{H}_{2} \mathrm{O}_{2}$ and NaOH, the organic compound formed is : (1) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH}$ ( 2)$\left(\mathrm{CH}_{3}\right)_{3} \mathrm{COH}$ (3) $\mathrm{CH}_{3} \mathrm{CHOHCH}_{3}$ (4) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}$ [Jee-Main offline 2014]

Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...

Sol. (1)

Q. Which one of the following class of compounds is obtained by polymerization of acetylene ? (1) Poly-ene (2) Poly-yne (3) Poly-amide (4) Poly-ester [Jee-Main offline 2014]

Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...

Sol. (2)

Q. The gas liberated by the electrolysis of Dipotassium succinate solution is : (1) Ethyne (2) Ethene (3) Propene (4) Ethane [Jee-Main offline 2014]

Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...

Sol. (2)

Q. The reagent needed for converting (1) $\mathrm{H}_{2} /$ lindlar Cat. (2) Cat. Hydrogenatio (4) LiNH $_{3}$ [Jee-Main offline 2014]

Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...

Sol. (4)

Q. on mercuration- demercuration produces the major product :- [Jee-Main offline 2014]

Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...

Sol. (1) Rearrangement of carbocation formed is not possible due to formatiion of cyclic non-classical carbocation.

Q. The major product obtained in the photo catalysed bromination of 2-methylbutane is :- (1) 2-bromo-2-methylbutane (2) 2-bromo-3-methylbutane (3) l-bromo-2-methylbutane (4) l-bromo-3-methylbutane [Jee-Main offline 2014]

Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...

Sol. (1)

Q. In the presence of peroxide, HC and HI do not give anti-Markownikoff s addition to alkenes because (1) All the steps are exothermic in HCl and HI (2) One of the steps is endothermic in HCl and HI (3) HCl is oxidizing and the HI is reducing (4) Both HCl and HI are strong acids [Jee-Main offline 2014]

Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...

Sol. (2) relectivity ratio for bromination is $1^{\circ}: 2^{\circ}: 3^{\circ}: 1: 82: 1600$ Hence $3^{\circ}$ product will be major product.

Q. Which compound would give 5-keto-2-methyl hexanal upon ozonlysis? [Jee-Main offline 2015]

Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...

Sol. (4)

Q. The trans-alkenes are formed by the reduction of alkynes with : (1) $\mathrm{NaBH}_{4}$ (2) Na/liq. NH $_{3}$ (3) Sn–HCl (4) $\mathrm{H}_{2}-\mathrm{Pd} / \mathrm{C}, \mathrm{BaSO}_{4}$ [Jee-Main offline 2018]

Download eSaral App for Video Lectures, Complete Revision, Study Material and much more...

Sol. (2) Birch reduction is anti addition. So trans alkene will be produced.

Administrator

Leave a comment

Please enter comment.
Please enter your name.


Comments
  • January 22, 2021 at 3:08 pm

    we can’t download e saral app in laptops….so it would be good if u concentrate here as much as you concentrate on your app

    17
  • January 22, 2021 at 3:07 pm

    NIce job guys…you can try adding more questions now

    1
  • December 24, 2020 at 8:06 am

    give some hard questions these questions are to easy
    by the way good questions ti solve

    9
  • XYZ
    August 31, 2020 at 7:10 pm

    Explanation should be added

    2
    • December 24, 2020 at 4:35 pm

      Explaination should be added

      1
  • August 21, 2020 at 11:00 am

    thanks so much for providing these important question….. please add some more questions so that we can clean our concepts…..again thanks …

    0
  • AA
    August 20, 2020 at 8:10 pm

    awesome

    3
  • August 17, 2020 at 9:32 am

    Thank you but try to update. Good questions

    0
  • August 5, 2020 at 7:19 pm

    Very less questions are there I suggested all question should be added

    0
  • July 12, 2020 at 2:30 pm

    Very useful but more questions to revise

    0
  • July 12, 2020 at 2:30 pm

    Very useful but more questions to revise

    0
  • June 4, 2020 at 9:11 am

    Good

    0
  • May 31, 2020 at 3:29 pm

    good

    0
  • April 11, 2020 at 10:09 pm

    Thank you it helps a lot.
    Make more like this please.

    0
  • April 6, 2020 at 12:32 pm

    Solutions are not opening

    0
    • MAR
      December 26, 2020 at 8:16 am

      Yaa

      0
  • December 31, 2019 at 7:40 pm

    It’s damn good site

    0