On account of the disruption in education due to the corona pandemic, we're opening up our platform for teachers, free of cost. Know More →

JEE Main > Hydrocarbons

Explore popular questions from Hydrocarbons for JEE Main. This collection covers Hydrocarbons previous year JEE Main questions hand picked by experienced teachers.

Physics
Behaviour of Perfect Gas and Kinetic Theory Motion of System of Particles and Rigid Body Electromagnetic Waves Physics Magnetic Effects of Current and Magnetism Work, Energy and Power Electromagnetic Induction and Alternating Currents Optics Gravitation Current Electricity Dual Nature of Matter and Radiation Vectors Laws of Motion Thermodynamics Electrostatics Properties of Bulk Matter Communication System Atoms and Nuclei Kinematics Physical World and Measurement Oscillations and Waves Electronic Devices & Semiconductor
Mathematics
Properties of Triangle Coordinate Geometry Circle and System of Circles Mathematics Statistics and Probability Vectors and Three-Dimensional Geometry Trigonometric Ratios & Identities Calculus Mathematical Reasoning Algebra Permutations and Combinations Sets, Relations and Functions Matrices and Determinants Linear Programming Logarithm, Indices, Surds and Partial Fraction Progressions Trigonometric Equation & Inequalities, Solution Of Triangles Correlation and Regression
Chemistry
Solutions Surface Chemistry Chemical Kinetics Electrochemistry General Principles and Processes of Isolation of Elements Structure of Atom Haloalkanes and Haloarenes Amines Chemistry in Everyday Life Some Basic Concepts of Chemistry Equilibrium States of Matter: Gases and Liquids Hydrogen Biomolecules Hydrocarbons Alcohols, Phenols and Ethers Organic Compounds Containing Nitrogen Environmental Chemistry p-Block Elements Aldehydes, Ketones and Carboxylic Acids Redox Reactions Coordination Compounds Polymers s-Block Element (Alkali and Alkaline earth metals) d and f Block Elements Organic Chemistry- Some Basic Principles and Techniques Classification of Elements and Periodicity in Properties Solid State Chemical Bonding and Molecular Structure Some p-Block Elements Chemistry Thermodynamics Nuclear Chemistry
Q 1.

Correct4

Incorrect-1

Which of the following statements regarding ethanoic acid and methyl methanoate are correct?
I. They are functional group isomers with molecular formula {tex} \mathrm { C } _ { 2 } \mathrm { H } _ { 4 } \mathrm { O } _ { 2 } {/tex}.
II. They belong to same homologous series.
III. They have different chemical properties.

A

I and II

I and III

C

II and III

D

I, II and III

Explanation

Q 2.

Correct4

Incorrect-1

Select pair of chain isomers from the following

A

I and II

B

II and IV

C

{tex} I {/tex} and {tex} I V {/tex}

II and III

Explanation

Q 3.

Correct4

Incorrect-1

How many structural isomers are possible for compounds containing {tex} \mathrm { C } , \mathrm { H } {/tex} and {tex} \mathrm { O } {/tex} atoms only with their molar masses 100 as well as the isomers are simultaneously ketones?

A

3

B

4

C

5

6

Explanation

Q 4.

Correct4

Incorrect-1

How many structural isomer are possible with the molecular formula {tex} \mathrm { C } _ { 8 } \mathrm { H } _ { 10 } {/tex}

A

3

4

C

5

D

6

Explanation

Q 5.

Correct4

Incorrect-1

How many different secondary halide names can be assigned to the compounds with molecular formula {tex} \mathrm { C } _ { 5 } \mathrm { H } _ { 11 } \mathrm { Cl } {/tex} (excluding stereoisomers)?

3

B

4

C

5

D

7

Explanation



Q 6.

Correct4

Incorrect-1

Which of the following compound will not undergo tautomerism?

A

B

C

Explanation

Q 7.

Correct4

Incorrect-1

Which of the following compounds will not show geometrical isomerism?

A

3-Phenyl-2-propenoic acid

B

2 -Butene

3-Methyl-2-butenoic acid

D

3-Methyl-2-pentenoic acid

Explanation

Q 8.

Correct4

Incorrect-1

Which of the following will have zero dipole moment?

A

cis-1, 2-Dichloroethene

trans-1, 2-Dichloroethene

C

{tex}trans{/tex}-1, 2-Dichloropropene

D

2-Pentyne

Explanation

Q 9.

Correct4

Incorrect-1

Which of the following compounds exhibits stereioisomerism?

A

2-Mehylbutene

B

3-Methylbutyne

C

3-Methylbutanoic acid

2-Methylbutanoic acid

Explanation

Q 10.

Correct4

Incorrect-1

A

Enantiomer

Diastereomer

C

Identical

D

Structural isomer

Explanation

Q 11.

Correct4

Incorrect-1

How many amide isomers are possible for {tex} \mathrm { C } _ { \mathrm { 4 } } \mathrm { H } _ { \mathrm { 9 } } \mathrm { ON } ? {/tex}

A

4

B

5

C

6

8

Explanation



Q 12.

Correct4

Incorrect-1

Order of stability of enol content:

A

{tex} a > b > c {/tex}

B

{tex} b > a > c {/tex}

{tex} b > c > a {/tex}

D

{tex} a > b > c {/tex}

Explanation

Q 13.

Correct4

Incorrect-1

Which of the following compounds does not have any geometrical isomer?

A

B

C

Explanation

Q 14.

Correct4

Incorrect-1

The correct order of the substituent in each of the following set in order of priority according to CIP rule

A

{tex} - \mathrm { Cl } > - \mathrm { OH } > - \mathrm { SH } > \mathrm { H } {/tex}

{tex} - \mathrm { CH } _ { 2 } - \mathrm { Br } > - \mathrm { CH } _ { 2 } - \mathrm { Cl } > - \mathrm { CH } _ { 2 } - \mathrm { OH } > - \mathrm { CH } _ { 3 } {/tex}

C

{tex} - \mathrm { CH } = \mathrm { O } > - \mathrm { OH } > - \mathrm { CH } _ { 3 } > - \mathrm { H } {/tex}

D

{tex} - \mathrm { OCH } _ { 3 } > - \mathrm { N } \left( \mathrm { CH } _ { 3 } \right) _ { 2 } > - \mathrm { CH } _ { 3 } > - \mathrm { CD } _ { 3 } {/tex}

Explanation

Q 15.

Correct4

Incorrect-1

Consider the following compounds,

The correct {tex} E / Z {/tex} configurational notations for the compounds I to II are respectively-

{tex} \mathrm { Z } , \mathrm { Z } {/tex}

B

{tex} \mathrm { E } , \mathrm { Z } {/tex}

C

{tex} E ,Z {/tex}

D

{tex} \mathrm { E } , \mathrm { E } {/tex}

Explanation

Q 16.

Correct4

Incorrect-1

How many cyclic isomers exists (structural and geometrical only) for {tex} \mathrm { C } _ { 3 } \mathrm { H } _ { 3 } \mathrm { Cl } _ { 3 } ? {/tex}

A

2

3

C

4

D

5

Explanation

Q 17.

Correct4

Incorrect-1

Which of the following compounds is a meso compound?

A

B

D

Explanation

Q 18.

Correct4

Incorrect-1

Which of the following is not correct representation of L-amino acids

A

C

D

Explanation



Q 19.

Correct4

Incorrect-1

What is true regarding a meso form of a compound?

A

A meso form is achiral due ot the presence of an axis of symmetry

B

A meso form does not contain any chiral carbon

C

A meso form cannot be isolated from its optically active stereoisomer by fractional crystallisation

A meso form is achiral due to internal compensation of optical rotation

Explanation

Q 20.

Correct4

Incorrect-1

Which compound does not possess a plane of symmetry?

A

I, II and V

B

I, III and IV

C

II, III and IV

III and IV

Explanation

Q 21.

Correct4

Incorrect-1

What is wrong about enantiomers of 2-chloropropanoic acid?

A

Have same solubility in water

B

Have same {tex} \mathrm { pK } _ { \mathrm { a } } {/tex} value

C

Have same refractive Index

Have same rate of reactions with {tex} ( + )-2-{/tex}butanol

Explanation

Q 22.

Correct4

Incorrect-1

Calculate the number of stereoisomerism for

A

2

4

C

8

D

6

Explanation

Q 23.

Correct4

Incorrect-1

The number of stereoisomers possible for the compound is-

A

2

4

C

6

D

8

Explanation

Q 24.

Correct4

Incorrect-1


a and {tex} b {/tex} are stereoismers sum of {tex} ( a + b = ? ) {/tex}

A

4

6

C

8

D

12

Explanation

Q 25.

Correct4

Incorrect-1

Consider the following Newman projection.

Which of the following is the correct representation of the same compound in Fischer projection formula (ignore conformational aspect)?

B

C

D

Explanation

Sign up for a free trial

Fill in these details and we will get you started with our trial plan!

Your request has been placed successfully.
Okay