1.

    Which factor DOES NOT contribute to the greater stability of a tertiary butyl carbocation compared to a secondary butyl carbocation?

    A

    Steric hindrance

    B

    +I effect

    C

    Hyperconjugation

    D

    +I effect and Hyperconjugation

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Electron Displacements
    PYQ YEAR: 2020
    πŸŽ“ Ncert Level:Analyzing
    🎯Difficulty :Easy
    ⚑ Time Required :1.5 mins
    πŸ”„Ncert Concepts :Organic Chemistry, Carbocations, Stability, Inductive Effect, Hyperconjugation, Steric Hindrance

    Related Questions

    1.

    A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of ?

    A

    βˆ’I{\rm{- I}} effect of βˆ’β€‰CH3 - \,{\rm{C}}{{\rm{H}}_3} groups

    B

    βˆ’R{\rm{- R}} effect of βˆ’β€‰CH3 - \,{\rm{C}}{{\rm{H}}_3} groups

    C

    +R{\rm{ + R}} effect of βˆ’β€‰CH3 - \,{\rm{C}}{{\rm{H}}_3} groups

    D

    Hyperconjugation

    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 :carbocation stability, inductive effect, resonance effect, hyperconjugation

    2.

    Which of the following is a +M group?

    A

    -NO2

    B

    -CN

    C

    -OH

    D

    -CHO

    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 :1 mins
    πŸ”„Ncert Concepts :Mesomeric effect, Electron donating groups, Electron withdrawing groups

    3.

    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, Sigma electrons, Pi electrons

    4.

    Strongest acid among the following

    A

    CCl3COOHCC{l_3}COOH

    B

    CH3COOHC{H_3}COOH

    C

    CF3COOHC{F_3}COOH

    D

    CBr3COOHCB{r_3}COOH

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

    5.

    Which of the following is most acidic

    A

    CCl3COOHCC{l_3}COOH

    B

    CHCl2COOHCHC{l_2}COOH

    C

    CH2ClCOOHC{H_2}ClCOOH

    D

    CH3COOHC{H_3}COOH

    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 :acidity, inductive effect, carboxylic acids

    6.

    Which group has the highest + Inductive effect?

    A

    CH3βˆ’{\rm{C}}{{\rm{H}}_3} -

    B

    CH3CH2βˆ’{\rm{C}}{{\rm{H}}_3}{\rm{C}}{{\rm{H}}_2} -

    C

    (CH3)2CHβˆ’{\left( {{\rm{C}}{{\rm{H}}_3}} \right)_2}{\rm{CH}} -

    D

    (CH3)3β€…β€ŠCβˆ’{\left( {{\rm{C}}{{\rm{H}}_3}} \right)_3}{\rm{\;C}} -

    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

    7.

    Which of the following has +R + R effect

    A

    βˆ’CN - CN

    B

    βˆ’CHO - CHO

    C

    βˆ’NH2 - N{H_2}

    D

    βˆ’NO2 - N{O_2}

    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 effect, Electron donating groups, Electron withdrawing groups

    8.

    Among the following compounds nitrobenzene, benzene, aniline and phenol, the strongest basic behaviour in acid medium is exhibited by :

    A

    Phenol

    B

    Aniline

    C

    Nitrobenzene

    D

    Benzene

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Electron Displacements
    πŸŽ“ Ncert Level:Analyzing
    🎯Difficulty :Easy
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Basicity, Organic Chemistry, Resonance, Substituent Effects

    9.

    The resonance effect involves the delocalization of:

    A

    sigma electrons

    B

    pi electrons and lone pairs

    C

    only sigma electrons

    D

    only lone pairs

    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 :0.5 mins
    πŸ”„Ncert Concepts :Electron Displacement Effects, Resonance Effect

    10.

    The stability of tertiary butyl carbocation is greater than secondary butyl carbocation due to:

    A

    -I effect

    B

    Steric hindrance

    C

    +I effect and hyperconjugation

    D

    Resonance

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Electron Displacements
    PYQ YEAR: 2020
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Organic Chemistry, Carbocations, Stability

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