1.

    In which of the following compounds does the -NO2 group exert the STRONGEST -M effect?

    A

    Nitrobenzene

    B

    p-nitrotoluene

    C

    p-nitrophenol

    D

    p-nitrobenzaldehyde

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Electron Displacements
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Hard
    ⚑ Time Required :1.5 mins
    πŸ”„Ncert Concepts :Mesomeric Effect, Resonance, Electron Withdrawing Groups, Hammett Equation

    Related Questions

    1.

    Among the following the dissociation constant is highest for

    A

    C6H5OH{{\rm{C}}_6}{{\rm{H}}_5}{\rm{OH}}

    B

    C6H5CH2OH{{\rm{C}}_6}{{\rm{H}}_5}{\rm{C}}{{\rm{H}}_2}{\rm{OH}}

    C

    CH3βˆ’C≑CH{\rm{C}}{{\rm{H}}_3} - {\rm{C}} \equiv {\rm{CH}}

    D

    CH3NH3+Clβˆ’{\rm{C}}{{\rm{H}}_3}{\rm{NH}}_3^ + {\rm{C}}{{\rm{l}}^ - }

    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 :dissociation constant, acidity, conjugate base stability, inductive effect, resonance

    2.

    Shifting of electrons of a multiple bond under the influence of a reagent is called :

    A

    II -effect

    B

    EE -effect

    C

    MM -effect

    D

    TT -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 :electronic effects, organic chemistry, reaction mechanism

    3.

    In which of the following pβˆ’p - electrons of the halogens are not involved in delocalisation?

    A

    Chlorobenzene

    B

    Bromobenzene

    C

    Allyl chloride

    D

    Vinyl chloride

    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 :Delocalisation, Resonance, Halogens, p-electrons

    4.

    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:Application
    🎯Difficulty :Easy
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Resonance, Mesomeric effect, Electron donating groups, Electron withdrawing groups

    5.

    Arrange pp- toluidine (I) N,N-dimethyl-pp- toluidine (II) pp- nitroaniline (III) and aniline (IV) in order of decreasing basicity

    A

    I>IV>III>II

    B

    I>II>III>IV

    C

    II>I>IV>III

    D

    III>I>II>IV

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Electron Displacements
    πŸŽ“ Ncert Level:Analyzing
    🎯Difficulty :Hard
    ⚑ Time Required :3 mins
    πŸ”„Ncert Concepts :Basicity of amines, substituent effects, resonance, inductive effect

    6.

    Orbital interaction between the Οƒ\sigma - bonds of a substituent group and a neighbouring Ο€\pi - orbital is known as

    A

    Hyperconjugation

    B

    Inductive effect

    C

    Steric effect

    D

    Electric quadrapole interactions

    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, sigma bonds, pi orbitals

    7.

    Correct gradation of basic charactor

    A

    NH3CH3NH2>NF3{\rm{N}}{{\rm{H}}_3}{\rm{C}}{{\rm{H}}_3}{\rm{N}}{{\rm{H}}_2} > N{{\rm{F}}_3}

    B

    CH3NH2>NH3>NF3{\rm{C}}{{\rm{H}}_3}{\rm{N}}{{\rm{H}}_2} > N{{\rm{H}}_3} > N{{\rm{F}}_3}

    C

    NF3>CH3NH2>NH3{\rm{N}}{{\rm{F}}_3} > C{{\rm{H}}_3}{\rm{N}}{{\rm{H}}_2} > N{{\rm{H}}_3}

    D

    CH3NH2>NF3>NH3{\rm{C}}{{\rm{H}}_3}{\rm{N}}{{\rm{H}}_2} > N{{\rm{F}}_3} > N{{\rm{H}}_3}

    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 :3 mins
    πŸ”„Ncert Concepts :Basicity, Inductive Effect, Lone Pair Availability, Electronegativity

    8.

    Most stable carbanion

    A

    Cβ€ΎH2βˆ’CH2βˆ’NO2\overline C {H_2} - C{H_2} - N{O_2}

    B

    Cβ€ΎH2βˆ’CH2βˆ’CN\overline C {H_2} - C{H_2} - CN

    C

    Cβ€ΎH2βˆ’CH2βˆ’COOH\overline C {H_2} - C{H_2} - COOH

    D

    Cβ€ΎH2βˆ’CH2βˆ’CH2βˆ’CH2βˆ’F\overline C {H_2} - C{H_2} - C{H_2} - C{H_2} - F

    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 :carbanion stability, inductive effect, resonance

    9.

    Which of the chloride is less reactive towards hydrolysis?

    A

    Vinyl chloride

    B

    Allyl chloride

    C

    Ethyl chloride

    D

    tβˆ’t - butyl chloride

    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 :hydrolysis, reactivity, carbocation stability, resonance

    10.

    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

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