1.

    Which of the following statements is INCORRECT regarding the mesomeric effect?

    A

    It involves the delocalization of Ο€ electrons or lone pairs

    B

    It operates only in conjugated systems

    C

    It can be positive (+M/+R) or negative (-M/-R)

    D

    It is a temporary effect

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Electron Displacements
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Hard
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Mesomeric Effect, Resonance, Conjugation, Inductive Effect

    Related Questions

    1.

    The effect involving the complete transfer of a shared pair of electrons to one of the atoms joined by a multiple bond at the requirement of attacking reagent is called :

    A

    Nucleophilic substitution

    B

    Electrophilic addition

    C

    Free radical substitution

    D

    Nucleophilic addition

    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 :electromeric effect, electronic effects, organic chemistry

    2.

    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, Carbocation stability

    3.

    Mesomeric effect involves delocalisation of

    A

    Pi-electrons

    B

    Sigma electrons

    C

    Protons

    D

    None of these

    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 :Mesomeric effect, Pi-electrons, Sigma electrons

    4.

    Amongst the following the compound that can most readily get sulphonated is

    A

    Benzene

    B

    Toluene

    C

    Nitrobenzene

    D

    Chlorobenzene

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Electron Displacements
    πŸŽ“ Ncert Level:Analyzing
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Electrophilic Aromatic Substitution, Sulfonation, Activating and Deactivating Groups, Resonance, Inductive effect

    5.

    Amongst the following the compound that can most readily get sulphonated is

    A

    Benzene

    B

    Toluene

    C

    Nitrobenzene

    D

    Chlorobenzene

    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 :Electrophilic Aromatic Substitution, Sulfonation, Activating and Deactivating Groups

    6.

    The kind of delocalisation involving sigma bond is called

    A

    Inductive effect

    B

    Hyperconjugation effect

    C

    Electromeric effect

    D

    Mesomeric effect

    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 :Delocalization, Sigma bond, Inductive effect, Hyperconjugation, Electromeric effect, Mesomeric effect

    7.

    In hyper conjugation there is overlap between

    A

    Pβˆ’Ο€βˆ’orbitalsP - \pi - orbitals

    B

    2Ο€βˆ’orbitals2\pi - orbitals

    C

    dβˆ’andβ€‰Ο€βˆ’orbitalsd - and\,\pi - orbitals

    D

    Οƒβˆ’and pβˆ’orbitals\sigma - and\,p - orbitals

    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 :hyperconjugation, sigma bond, p orbital

    8.

    The reaction of sodium ethoxide with iodoethane to from diethyl is termed as

    A

    Electrophilic substitution

    B

    Nuclephilic substitution

    C

    Electrophilic addition

    D

    Radical substitution

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Electron Displacements
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Nucleophilic substitution, Reaction mechanisms, Organic chemistry

    9.

    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, Molecular structure, Bonding

    10.

    Which of the following order is correct regarding the acidity of carboxylic acids?

    A

    Cl3CCOOH>Cl2CHCOOH>ClCH2COOH{\rm{C}}{{\rm{l}}_3}{\rm{CCOOH}} > {\rm{C}}{{\rm{l}}_2}{\rm{CHCOOH}} > {\rm{ClC}}{{\rm{H}}_2}{\rm{COOH}}

    B

    Cl3CCOOH>Cl2CHCOOH<ClCH2COOH{\rm{C}}{{\rm{l}}_3}{\rm{CCOOH}} > {\rm{C}}{{\rm{l}}_2}{\rm{CHCOOH}} < {\rm{ClC}}{{\rm{H}}_2}{\rm{COOH}}

    C

    Cl3CCOOH⟨Cl2CHCOOH⟩ClCH2COOH{\rm{C}}{{\rm{l}}_3}{\rm{CCOOH}}\left\langle {{\rm{C}}{{\rm{l}}_2}{\rm{CHCOOH}}} \right\rangle {\rm{ClC}}{{\rm{H}}_2}{\rm{COOH}}

    D

    Cl3CCOOH<Cl2CHCOOH<ClCH2COOH{\rm{C}}{{\rm{l}}_3}{\rm{CCOOH}} < {\rm{C}}{{\rm{l}}_2}{\rm{CHCOOH}} < {\rm{ClC}}{{\rm{H}}_2}{\rm{COOH}}

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Electron Displacements
    πŸŽ“ Ncert Level:Analyzing
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :acidity of carboxylic acids, inductive effect, electron withdrawing groups

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