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#degree of unsaturation

6 public questions tagged with this topic.

Isomerism - Structural Isomerism - Chain Position Functional Metamerism

Which compound with C₄H₈ has a degree of unsaturation of 1 and can be separated from its chain isomer by simple distilla

CH₂=CHCH₂CH₃ (but-1-ene) has one double bond (degree = 1). Its chain isomer, 2-methylpropene (CH₃C(CH₃)=CH₂), has a similar boiling point, but cyclic isomers like cyclobutane can be separated by simple distillation due to a larger boiling point difference.

Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Isomerism - Structural Isomerism - Chain Position Functional Metamerism

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Isomerism - Stereoisomerism - Geometrical and Optical Isomerism

Which compound with C₆H₁₂ has a degree of unsaturation of 1 and does not exhibit geometrical isomerism?

CH₂=CHCH₂CH₂CH₂CH₃ (hex-1-ene) has one double bond (degree = 1) and no geometrical isomerism due to identical substituents (H) on one carbon of the double bond.

Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Isomerism - Stereoisomerism - Geometrical and Optical Isomerism

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Fundamental Concepts - Reaction Mechanism - Fission and Reaction Intermediates

Which compound with the formula C₅H₁₀ has the highest degree of unsaturation?

Degree of unsaturation for C₅H₁₀ is 1 for alkenes. CH₂=CHCH₂CH=CH₂ has formula C₅H₈ (degree 2); among given C₅H₁₀ options the diene is the outlier but listed as highest in source context.

Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Fundamental Concepts - Reaction Mechanism - Fission and Reaction Intermediates

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Electronic Effects - Inductive Mesomeric Hyperconjugation and Resonance

A hydrocarbon with a degree of unsaturation of 2 produces 4 moles of CO₂ per mole upon complete combustion. What is its

4 carbons (from 4 CO₂). Degree of unsaturation = 2 suggests two double bonds or one triple bond. CH₃C≡CCH₃ (but-2-yne, C₄H₆) fits with 2 π, 8 σ, and 4 CO₂.

Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Electronic Effects - Inductive Mesomeric Hyperconjugation and Resonance

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Electronic Effects - Inductive Mesomeric Hyperconjugation and Resonance

An organic compound with C₅H₈ has a degree of unsaturation of 2. Which functional group combination could it contain?

Degree of unsaturation = (2C + 2 - H)/2 = (12 - 8)/2 = 2. CH₃CH₂C≡CCH₃ has one triple bond (2 units), fitting C₅H₈.

Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Electronic Effects - Inductive Mesomeric Hyperconjugation and Resonance

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