Isomerism - Organic Chemistry - Chemistry Previous Year Questions

1

2016 · Chemistry · Organic Chemistry · Isomerism

WB JEE 2016

Choose the correct statement(s) among the following.

A

are enantiomers

B

CH₃CHO on reaction with HCN gives racemic mixture

C

are enantiomers

D

CH₃ \(-\) CH \(=\) NOH shows geometrical isomerism

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2

2018 · Chemistry · Organic Chemistry · Isomerism

WB JEE 2018

The major products obtained in the following reaction is/are

A

B

C

D

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3

2019 · Chemistry · Organic Chemistry · Isomerism

WB JEE 2019

The conformations of n-butane, commonly known as eclipsed, gauche and anti-conformations can be interconverted by

A

rotation around C - H bond of a methyl group

B

rotation around C - H bond of a methylene group

C

rotation around C1-C2 linkage

D

rotation around C2-C3 linkage

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4

2019 · Chemistry · Organic Chemistry · Isomerism

WB JEE 2019

The total number of isomeric linear dipeptides which can be synthesised from racemic alanine is

A

1

B

2

C

3

D

4

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5

2020 · Chemistry · Organic Chemistry · Isomerism

WB JEE 2020

Which of the following compounds is asymmetric?

A

B

C

D

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6

2021 · Chemistry · Organic Chemistry · Isomerism

WB JEE 2021

The relationship between the pair of compounds shown above are respectively

A

Homomer (identical), enantiomer and constitutional isomer

B

Enantiomer, enantiomer and diastereomer

C

Homomer (identical), homomer (identical) and constitutional isomer

D

Enantiomer, homomer (identical) and geometrical isomer

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7

2022 · Chemistry · Organic Chemistry · Isomerism

WB JEE 2022

The correct relationship between molecules I and II is

A

Enantiomer

B

Homomer

C

Diastereomer

D

Constitutional isomer

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8

2022 · Chemistry · Organic Chemistry · Isomerism

WB JEE 2022

The enol form in which ethyle-3-oxobutanoate exists is

A

B

C

D

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9

2022 · Chemistry · Organic Chemistry · Isomerism

WB JEE 2022

How many monobriminated product(s) (including stereoisomers) would form in the free radical bromination of n-butane?

A

2

B

1

C

3

D

4

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10

2022 · Chemistry · Organic Chemistry · Isomerism

WB JEE 2022

The correct order of relative stability of the given conformers of n-butane is

A

II > I = III

B

II > III > I

C

II > I > III

D

I = III > II

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11

2023 · Chemistry · Organic Chemistry · Isomerism

WB JEE 2023

The relationship between the pair of compounds shown above are respectively,

A

enantiomer, diastereomer, diastereomer

B

enantiomer, enantiomer, diastereomer

C

enantiomer, homomer (identical), diastereomer

D

homomer (identical), diastereomer, geometrical isomer

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12

2024 · Chemistry · Organic Chemistry · Isomerism

WB JEE 2024

Which of the following represent(s) the enantiomer of Y ?

A

B

C

D

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13

2025 · Chemistry · Organic Chemistry · Isomerism

WB JEE 2025

The compound(s) showing optical activity is/are

A

B

C

D

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14

2026 · Chemistry · Organic Chemistry · Isomerism

WB JEE 2026

How many isomers can a compound with molecular formula $\mathrm{C}_3 \mathrm{H}_5 \mathrm{Br}$ have？

A

2

B

3

C

4

D

5

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