1.

    A solution is prepared by dissolving 0.010.01 moles of NH4ClNH_4Cl and 0.10.1 moles of NH3NH_3 in 11 L of water. If the KbK_b for NH3NH_3 is 1.8imes10−51.8 imes 10^{-5}, what is the approximate pH of the solution?

    A

    4.75

    B

    9.25

    C

    10.25

    D

    11.25

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Chemical Equilibrium
    🎯Topic:Acid-Base Theories
    🎓 Ncert Level:Application
    🎯Difficulty :Hard
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Acid-Base Theories, Buffer Solutions, Henderson-Hasselbalch Equation

    Related Questions

    1.

    Which is decreasing order of strength of bases?O_H,N_H2,HC≡C−andCH3CH2−\mathop {\rm{O}}\limits^\_ {\rm{H}},\mathop {\rm{N}}\limits^\_ {{\rm{H}}_2},{\rm{HC}} \equiv {{\rm{C}}^ - }{\rm{and C}}{{\rm{H}}_3}{\rm{CH}}_2^ -

    A

    {{\rm{H}}_3}{\rm{CCH}}_2^ - > N{\rm{H}}_2^ - > HC \equiv {{\rm{C}}^ - } > O{{\rm{H}}^ - }

    B

    {\rm{HC}} \equiv {{\rm{C}}^ - } > C{{\rm{H}}_3}{\rm{CH}}_2^ - > N{\rm{H}}_2^ - > O{{\rm{H}}^ - }

    C

    {\rm{O}}{{\rm{H}}^ - } > N{\rm{H}}_2^ - > CH \equiv {{\rm{C}}^ - } > {{\rm{H}}_3}{\rm{CCH}}_2^ -

    D

    {\rm{NH}}_2^ - > HC \equiv {{\rm{C}}^ - } > O{{\rm{H}}^ - } > {{\rm{H}}_3}{\rm{CCH}}_2^ -

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Chemical Equilibrium
    🎯Topic:Acid-Base Theories
    🎓 Ncert Level:Analyzing
    🎯Difficulty :Medium
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :Base strength, conjugate acid stability, electronegativity, inductive effect, hybridization

    2.

    Which is the strongest acid?

    A

    CH3COOH{\rm{C}}{{\rm{H}}_3}{\rm{COOH}}

    B

    CH2ClCOOH{\rm{C}}{{\rm{H}}_2}{\rm{ClCOOH}}

    C

    CHCl2COOH{\rm{CHC}}{{\rm{l}}_2}{\rm{COOH}}

    D

    CCl3COOH{\rm{CC}}{{\rm{l}}_3}{\rm{COOH}}

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Chemical Equilibrium
    🎯Topic:Acid-Base Theories
    🎓 Ncert Level:Application
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :acidity, inductive effect, electronegativity

    3.

    Four species are listed below

    I. HCO3−{\rm{HCO}}_3^ -

    II. H3O+{{\rm{H}}_3}{{\rm{O}}^ + }

    III. HSO4−{\rm{HSO}}_4^ -

    IV. HSO3F{\rm{HS}}{{\rm{O}}_3}{\rm{F}}

    Which one of the following is the correct sequence of their acid strength?

    A

    (iv)<(ii)<(iii)<(i)\left( {{\rm{iv}}} \right) < \left( {{\rm{ii}}} \right) < \left( {{\rm{iii}}} \right) < \left( {\rm{i}} \right)

    B

    (ii)<(iii)<(i)<(iv)\left( {{\rm{ii}}} \right) < \left( {{\rm{iii}}} \right) < \left( {\rm{i}} \right) < \left( {{\rm{iv}}} \right)

    C

    (i)<(iii)<(ii)<(iv)\left( {\rm{i}} \right) < \left( {{\rm{iii}}} \right) < \left( {{\rm{ii}}} \right) < \left( {{\rm{iv}}} \right)

    D

    (iii)<(i)<(iv)<(ii)\left( {{\rm{iii}}} \right) < \left( {\rm{i}} \right) < \left( {{\rm{iv}}} \right) < \left( {{\rm{ii}}} \right)

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Chemical Equilibrium
    🎯Topic:Acid-Base Theories
    🎓 Ncert Level:Analyzing
    🎯Difficulty :Easy
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :acid strength, conjugate base stability, electronegativity, inductive effect

    4.

    The strongest Bronsted base is

    A

    ClO3−{\rm{ClO}}_3^ -

    B

    ClO2−{\rm{ClO}}_2^ -

    C

    ClO4−{\rm{ClO}}_4^ -

    D

    ClO−{\rm{Cl}}{{\rm{O}}^ - }

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Chemical Equilibrium
    🎯Topic:Acid-Base Theories
    🎓 Ncert Level:Analyzing
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Bronsted base strength, conjugate base stability, inductive effect

    5.

    Which one is the strongest base?

    A

    OH−{\rm{O}}{{\rm{H}}^ - }

    B

    RO−R{O^ - }

    C

    NH2−{\rm{NH}}_2^ -

    D

    R−{R^ - }

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Chemical Equilibrium
    🎯Topic:Acid-Base Theories
    🎓 Ncert Level:Analyzing
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Basicity, conjugate base, stability of anion, inductive effect

    6.

    In HS−,I−,R−NH2,NH3{\rm{H}}{{\rm{S}}^ - },{{\rm{I}}^ - },{\rm{R}} - {\rm{N}}{{\rm{H}}_2},{\rm{N}}{{\rm{H}}_3} order of proton accepting tendency will be:

    A

    I−>NH3>RNH2>HS−{{\rm{I}}^ - } > N{{\rm{H}}_3} > R{\rm{N}}{{\rm{H}}_2} > {\rm{H}}{{\rm{S}}^ - }

    B

    NH3>RNH2>HS−>I−{\rm{N}}{{\rm{H}}_3} > R{\rm{N}}{{\rm{H}}_2} > H{{\rm{S}}^ - } > {{\rm{I}}^ - }

    C

    RNH2>NH3>HS−>I−R{\rm{N}}{{\rm{H}}_2} > N{{\rm{H}}_3} > H{{\rm{S}}^ - } > {{\rm{I}}^ - }

    D

    HS−>RNH2>NH3>I−{\rm{H}}{{\rm{S}}^ - } > R{\rm{N}}{{\rm{H}}_2} > N{{\rm{H}}_3} > {{\rm{I}}^ - }

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Chemical Equilibrium
    🎯Topic:Acid-Base Theories
    🎓 Ncert Level:Analyzing
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Basicity, Proton Acceptor, Inductive Effect, Electronegativity, Acid Strength

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