1.

    The hyperconjugation effect involves the delocalization of:

    A

    Ο€ electrons

    B

    Οƒ electrons of C-H bond

    C

    Lone pair electrons

    D

    None of the above

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Electron Displacements
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Hyperconjugation, Sigma bond, Electron delocalization

    Related Questions

    1.

    Which of the following alkene is maximum stable (R=CH3)(R = C{H_3})

    A

    R2C=CR2{R_2}C = C{R_2}

    B

    Rβˆ’CH=CR2R - CH = C{R_2}

    C

    Rβˆ’CH=CHβˆ’RR - CH = CH - R

    D

    Rβˆ’CH=CH2R - CH = C{H_2}

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Electron Displacements
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Easy
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :alkene stability, hyperconjugation, substitution

    2.

    The resonating structures :

    A

    Differ only in the arrangement of electrons

    B

    Differ in number of paired and unpaired electrons

    C

    Differ largely in their energy contents

    D

    Do not lie in the same plane

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Electron Displacements
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Resonance, Resonance Structures, Electron Arrangement

    3.

    Who pointed out the concept hyperconjugation?

    A

    Nathan and Baker

    B

    Mullikan

    C

    Kekule

    D

    Kolbe

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Electron Displacements
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Hyperconjugation, Organic Chemistry

    4.

    Inductive effect involves

    A

    Delocalisation of Οƒ\sigma electrons

    B

    partial displacement of Οƒ\sigma electrons

    C

    Delocalisation of Ο€\pi electrons

    D

    Displacement of lone pair

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Electron Displacements
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Inductive effect, sigma electrons, pi electrons, lone pairs

    5.

    Mesomeric effect is due to

    A

    Delocalisation of Οƒ\sigma electrons

    B

    Delocalisation of Ο€\pi electrons

    C

    Migration of H – atom

    D

    Migration of proton

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Electron Displacements
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Mesomeric effect, Delocalization of electrons, sigma electrons, pi electrons

    6.

    Which of the following alkyl groups has the maximum +I + I effect

    A

    (CH3)2CHβˆ’{\left( {C{H_3}} \right)_2}CH{\rm{ }} -

    B

    (CH3)3Cβˆ’{\left( {C{H_3}} \right)_3}C -

    C

    CH3CH2βˆ’C{H_3}C{H_2} -

    D

    CH3βˆ’C{H_3} -

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Electron Displacements
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Inductive effect, Alkyl groups, Electron donating groups

    7.

    Chloroacetic acid is a stronger acid than acetic acid. This can be explained using

    A

    βˆ’M - M effect

    B

    βˆ’I - I effect

    C

    +M + M effect

    D

    +I + I effect

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Electron Displacements
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :inductive effect, acid strength, substituent effects

    8.

    In which of the following does the inductive effect play a significant role?

    A

    Acidity of carboxylic acids

    B

    Bond lengths of alkanes

    C

    Dipole moment of diatomic molecules

    D

    Hybridization of carbon atoms

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Electron Displacements
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚑ Time Required :0.5 mins
    πŸ”„Ncert Concepts :Electron Displacement Effects, Inductive Effect, Carboxylic Acids, Amines, Carbocations

    9.

    Which of the following does not have a resonance structure?

    A

    Benzene

    B

    Benzaldehyde

    C

    Acetaldehyde

    D

    Benzylamine

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Electron Displacements
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :resonance, delocalization, pi bonds, lone pairs

    10.

    In benzene, all the Cβˆ’C{\rm{C}} - {\rm{C}} bonds are of equal length because of :

    A

    Isomerism

    B

    Resonance

    C

    Tautomerism

    D

    Inductive effect

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Electron Displacements
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Resonance, Chemical Bonding, Benzene Structure

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