1.

    Consider the endothermic reaction: N2O4(g)⇌2NO2(g)N_2O_4(g) \rightleftharpoons 2NO_2(g). A sealed container filled with an equilibrium mixture of N2O4N_2O_4 and NO2NO_2 is suddenly immersed in an ice bath. Which of the following changes will occur initially?

    A

    The concentration of NO2NO_2 increases.

    B

    The concentration of N2O4N_2O_4 increases.

    C

    The equilibrium constant (KcK_c) increases.

    D

    No change occurs.

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Chemical Equilibrium
    🎯Topic:Le-Chatlier'S Principle
    🎓 Ncert Level:Application
    🎯Difficulty :Hard
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Le Chatelier's Principle, Equilibrium, Temperature Effects, Endothermic Reactions

    Related Questions

    1.

    The equilibrium which remains unaffected by change in pressure of the reactants is

    A

    N2(g)+O2(g)⇋2NO(g){{\rm{N}}_2}\left( {\rm{g}} \right) + {{\rm{O}}_2}\left( {\rm{g}} \right)\leftrightharpoons2{\rm{NO}}\left( {\rm{g}} \right)

    B

    2SO2(g)+O2(g)⇋2SO3(g)2{\rm{S}}{{\rm{O}}_2}\left( {\rm{g}} \right) + {{\rm{O}}_2}\left( {\rm{g}} \right)\leftrightharpoons2{\rm{S}}{{\rm{O}}_3}\left( {\rm{g}} \right)

    C

    2O3(g)⇋3O2(g)2{{\rm{O}}_3}\left( {\rm{g}} \right)\leftrightharpoons3{{\rm{O}}_2}\left( {\rm{g}} \right)

    D

    2NO2⇋N2O4(g)2{\rm{N}}{{\rm{O}}_2}\leftrightharpoons{{\rm{N}}_2}{{\rm{O}}_4}\left( {\rm{g}} \right)

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Chemical Equilibrium
    🎯Topic:Le-Chatlier'S Principle
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Le Chatelier's principle, equilibrium, pressure

    2.

    On applying pressure to the equilibrium, ice  ⇋  waterice\;\leftrightharpoons\;water

    Which phenomenon will happen?

    A

    More ice will be formed

    B

    More water will be formed

    C

    Equilibrium will not be disturbed

    D

    Water will evaporate

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Chemical Equilibrium
    🎯Topic:Le-Chatlier'S Principle
    🎓 Ncert Level:Application
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Le Chatelier's principle, phase equilibrium, density

    3.

    In the manufacture of NH3{\rm{N}}{{\rm{H}}_3} by Haber’s process, the condition which would give maximum yield isN2+3H2  ⇋  2NH3+Q  kcal{{\rm{N}}_2} + 3{{\rm{H}}_2}\;\leftrightharpoons\;2{\rm{N}}{{\rm{H}}_3} + Q\;{\rm{kcal}}

    A

    Low temperature and high pressure

    B

    ow temperature, low pressure and low concentration of H2{{\rm{H}}_2}

    C

    High temperature, low pressure and low concentration

    D

    High temperature, high pressure and high concentration

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Chemical Equilibrium
    🎯Topic:Le-Chatlier'S Principle
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Le Chatelier's Principle, Chemical Equilibrium, Exothermic Reactions

    4.

    In the following reaction at equilibrium: A(aq)+B(aq)⇌C(aq)A(aq) + B(aq) \rightleftharpoons C(aq), adding more of substance A will:

    A

    Shift the equilibrium to the right

    B

    Shift the equilibrium to the left

    C

    Have no effect on the equilibrium position

    D

    Decrease the concentration of C

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Chemical Equilibrium
    🎯Topic:Le-Chatlier'S Principle
    🎓 Ncert Level:Application
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Le Chatelier's Principle, Equilibrium, Concentration

    5.

    For the reason, PCl5(g)⇋PCl3(g)+Cl2(g)PC{l_5}_{_{(g)}}\underset{{}}{\overset{{}}{\leftrightharpoons}}PC{l_3}_{_{(g)}} + C{l_2}_{_{(g)}} the forward reaction at constant temperature is favoured by

    A

    Decreasing pressure

    B

    Increasing pressure

    C

    Adding inert gas at constant volume

    D

    Increasing temperature

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Chemical Equilibrium
    🎯Topic:Le-Chatlier'S Principle
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Le Chatelier's Principle, Equilibrium, Gas Phase Reactions

    6.

    In the given reaction,

    2X(g)+Y(g)⇋2Z(g)  +  80  kcal,2X\left( {\rm{g}} \right) + Y\left( {\rm{g}} \right)\leftrightharpoons2Z\left( {\rm{g}} \right)\; + \;80\;{\rm{kcal}},

    Which combination of pressure and temperature will give the highest yield of Z at equilibrium?

    A

    1000  atm  and  200∘C1000\;atm\;and\;200^\circ C

    B

    500  atm  and  500∘C500\;{\rm{ }}atm\;{\rm{ }}and\;{\rm{ }}500^\circ C

    C

    1000  atm  and  100∘C1000\;atm\;and\;100^\circ C

    D

    500  atm  and  100∘C500\;atm\;and\;100^\circ C

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Chemical Equilibrium
    🎯Topic:Le-Chatlier'S Principle
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Le Chatelier's Principle, Equilibrium, Exothermic Reaction

    7.

    CH3COOH(l)+C2H5OH(l)  ⇋  CH3COOC2H5(l)+H2O(l){\rm{C}}{{\rm{H}}_3}{\rm{COOH}}\left( l \right) + {{\rm{C}}_2}{{\rm{H}}_5}{\rm{OH}}\left( l \right)\;\leftrightharpoons\;{\rm{C}}{{\rm{H}}_3}{\rm{COO}}{{\rm{C}}_2}{{\rm{H}}_5}\left( l \right) + {{\rm{H}}_2}{\rm{O}}\left( l \right)In the above reaction, one mole of each of acetic acid and alcohol are heated in the presence of little conc. H2SO4{{\rm{H}}_2}{\rm{S}}{{\rm{O}}_4}. On equilibrium being attained

    A

    1 mole of ethyl acetate is formed

    B

    2 mole of ethyl acetate is formed

    C

    2/32/3 mole of ethyl acetate is formed

    D

    1/21/2 mole of ethyl acetate is formed

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Chemical Equilibrium
    🎯Topic:Le-Chatlier'S Principle
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :Chemical Equilibrium, Equilibrium Constant, Stoichiometry

    8.

    For which of the following reactions,Kp=Kc{K_p} = {K_c} ?

    A

    N2+3H2⇋2NH3{{\rm{N}}_2} + 3{{\rm{H}}_2}\leftrightharpoons2{\rm{N}}{{\rm{H}}_3}

    B

    N2+O2⇋2NO{{\rm{N}}_2} + {{\rm{O}}_2}\leftrightharpoons2{\rm{NO}}

    C

    PCl5⇋PCl3+Cl2{\rm{PC}}{{\rm{l}}_5}\leftrightharpoons{\rm{PC}}{{\rm{l}}_3} + {\rm{C}}{{\rm{l}}_2}

    D

    2SO3⇋2SO2+O22{\rm{S}}{{\rm{O}}_3}\leftrightharpoons2{\rm{S}}{{\rm{O}}_2} + {{\rm{O}}_2}

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Chemical Equilibrium
    🎯Topic:Le-Chatlier'S Principle
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Chemical Equilibrium, Equilibrium Constant, Relationship between Kp and Kc

    9.

    In the reaction H2(g)+I2(g)⇌2HI(g)H_2(g) + I_2(g) \rightleftharpoons 2HI(g), at equilibrium, adding more H2H_2 will:

    A

    Have no effect on the equilibrium position.

    B

    Shift the equilibrium to the left, decreasing the concentration of HI.

    C

    Shift the equilibrium to the right, increasing the concentration of HI.

    D

    Decrease the value of the equilibrium constant.

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Chemical Equilibrium
    🎯Topic:Le-Chatlier'S Principle
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Le Chatelier's Principle, Equilibrium, Concentration

    10.

    Consider the following reaction at equilibriumN2(g)+3H2(g)⇌2NH3(g){N_2}(g) + 3{H_2}(g) \rightleftharpoons 2N{H_3}(g)if small amount of Helium gas is added to the reaction mixture at constant pressure then

    A

    Formation of NH3N{H_3} increases

    B

    Dissociation of NH3N{H_3} increases

    C

    There is no effect

    D

    Equilibrium constant value increases

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Chemical Equilibrium
    🎯Topic:Le-Chatlier'S Principle
    🎓 Ncert Level:Application
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Le Chatelier's principle, Equilibrium, Partial pressure, Ideal gas law

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