Structural Isomerism – JEE Main Previous Year Questions with Solutions

JEE Main Previous Year Papers Questions of Chemistry With Solutions are available at eSaral.

 

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Previous Years AIEEE/JEE Mains Questions

Q. The alkene that exhibits geometrical isomerism is :-

(1) 2–butene

(2) 2–methyl–2–butene

(3) Propene

(4) 2–methyl propene

[AIEEE-2009]

Sol. (1)


Q. The number of stereoisomers possible for a compound of the molecular formula

CH3–CH=CH–CH(OH)–Me is :-

(1) 4             (2) 6              (3) 3             (4) 2

[AIEEE-2009]

Sol. (1)

exhibits both geometrical as well as optical isomerism.

Cis – R

Trans – R

Cis – S

Trans – S


Q. Out of the following, the alkene that exhibits optical isomerism is :

(1) 2-methyl-2-pentene

(2) 3-methyl-2-pentene

(3) 4-methyl-1-pentene

(4) 3-methyl-1-pentene

[AIEEE-2010]

Sol. (4)


Q. Identify the compound that exhibits tautomerism :-

(1) 2-Pentanone (2) Phenol (3) 2-Butene (4) Lactic acid

[AIEEE-2011]

Sol. (1)


Q. The IUPAC name of the following compounds is :

(1) (Z) – 5 – hepten – 3 – yne

(2) (Z) – 2 – hepten – 4 – yne

(3) (E) – 5 – hepten – 3 – yne

(4) (E) – 2 – hepten – 4 – yne

[JEE-Main-2012]

Sol. (4)


Q. Dipole moment is shown by :-

(1) trans-2, 3-dichloro- 2-butene

(2) 1, 2-dichlorobenzene

(3) 1, 4-dichlorobenzene

(4) trans-1, 2-dinitroethene

[JEE-Main 2012]

Sol. (2)


Q. Maleic acid and fumaric acids are :-

(1) Tautomers

(2) Chain isomers

(5) Geometrical isomers

(4) Functional isomers

[JEE-Main 2012]

Sol. (3)


Q. Monocarboxylic acids are functional isomers of :

(1) Esters (2) Amines (3) Ethers (4) Alcohols

[JEE-Main 2013]

Sol. (1)

Monocarboxylic acid and Esters $(-\mathrm{COO}-)$ has same general $(-\mathrm{COOH}) .$

Formula $\left[\mathrm{C}_{\mathrm{n}} \mathrm{H}_{2 \mathrm{n}} \mathrm{O}_{2}\right]$ but different FG, so are called functional group isomer.


Q. Arrange in the correct order of stability (decreasing order) for the following molecules:

[JEE-Main 2013]

Sol. (3)


Q. For which of the following molecule significant $\mu \neq 0$

[JEE-Main 2014]

Sol. (2)

Due to presence of $\ell . \mathrm{p}_{(\mathrm{s})}$ on oxygen and sulphur atom which are out of plane hence


 

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Comments
  • May 16, 2020 at 4:28 pm

    some what good but very less questions for online very basic but really good to increases your confidence soo

  • April 23, 2020 at 12:32 pm

    Very less questions available here for doing online questions

  • April 11, 2020 at 1:01 am

    Good way to practice but do increase the level a bit … It is not comparable to jee main difficulty …

  • April 9, 2020 at 7:01 pm

    good ; useful but it’s somewhat low level

  • April 9, 2020 at 7:01 pm

    good ;useful but it’s somewhat low level

  • December 28, 2019 at 4:03 pm

    This type of experience (combination of all papers in one topic)is very useful to preparation of jee.
    Thanks for giving this type of experience.