JEE Main & Advanced Chemistry Equilibrium / साम्यावस्था Question Bank

done Le-Chatelier principle and it's application Total Questions - 73

• question_answer1)
  When in any system at equilibrium state pressure, temperature and concentration is changed then the equilibria shifted to such a direction which neutralize the effect of change. This is known as [MP PMT/PET 1988; DPMT 1985]
  A)
                  First law of thermodynamics done clear
  B)
                  Le-chatelier's principle  done clear
  C)
                  Ostwald's rule done clear
  D)
                  Hess's law of constant heat summation done clear
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• question_answer2)
  \[{{N}_{2}}+{{O}_{2}}\] ⇌ \[2NO-Q\,cals\]                 In the above reaction which is the essential condition for the higher production of \[NO\]            [CPMT 1971, 89; MP PMT 1985]
  A)
                  High temperature            done clear
  B)
                  High pressure done clear
  C)
                  Low temperature            done clear
  D)
                  Low pressure done clear
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• question_answer3)
  A reversible reaction is in equilibrium. If a factor is changed which affect it, then
  A)
                  The speed of forward and backward reaction increases done clear
  B)
                  The speed of forward and backward reaction decreases done clear
  C)
                  Only the speed of that reaction increases which nullifies the factor causing increase of speed done clear
  D)
                  No difference done clear
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• question_answer4)
  Which of the following reactions proceed at low pressure [MP PET 1985; CPMT 1984; MP PMT 1995; RPMT 1997]
  A)
                  \[{{N}_{2}}+3{{H}_{2}}\] ⇌ \[2N{{H}_{3}}\]          done clear
  B)
                  \[{{H}_{2}}+{{I}_{2}}\] ⇌ \[2HI\] done clear
  C)
                  \[PC{{l}_{5}}\] ⇌ \[PC{{l}_{3}}+C{{l}_{2}}\] done clear
  D)
                  \[{{N}_{2}}+{{O}_{2}}\] ⇌ \[2NO\] done clear
  View Solution play_arrow

• question_answer5)
  Le-chatelier principle is applicable
  A)
                  Both for physical and chemical equilibrium done clear
  B)
                  Only for chemical equilibrium done clear
  C)
                  Only for physical equilibrium done clear
  D)
                  Neither for B nor for C done clear
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• question_answer6)
  In the following reversible reaction                 \[2S{{O}_{2}}+{{O}_{2}}\]⇌\[2S{{O}_{3}}+Q\]\[Cal\]                 Most suitable condition for the higher production of \[S{{O}_{3}}\] is [NCERT 1974; DPMT 1983, 89; IIT 1981; MP PET 1992; MP PMT 1990, 91, 94, 99; CPMT 1973, 77, 84, 89, 94, 99]
  A)
                  High temperature and high pressure done clear
  B)
                  High temperature and low pressure done clear
  C)
                  Low temperature and high pressure done clear
  D)
                  Low temperature and low pressure done clear
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• question_answer7)
  When the pressure is applied over system ice ⇌ water what will happen? [MP PMT 1990; CPMT 1983; NCERT 1978; DPMT 2002]
  A)
                  More water will form done clear
  B)
                  More ice will form done clear
  C)
                  There will be no effect over equilibrium done clear
  D)
                  Water will decompose in \[{{H}_{2}}\] and \[{{O}_{2}}\] done clear
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• question_answer8)
  The reaction\[A+B\]⇌\[C+D\]+heat has reached equilibrium. The reaction may be made to proceed forward by [IIT 1978]
  A)
                  Adding more C done clear
  B)
                  Adding more D done clear
  C)
                  Decreasing the temperature done clear
  D)
                  Increasing the temperature done clear
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• question_answer9)
  On the velocity in a reversible reaction, the correct explanation of the effect of catalyst is            [MP PMT 1987]
  A)
                  It provides a new reaction path of low activation energy done clear
  B)
                  It increases the kinetic energy of reacting molecules done clear
  C)
                  It displaces the equilibrium state on right side done clear
  D)
                  It decreases the velocity of backward reaction done clear
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• question_answer10)
  Select the correct statement from the following [MP PMT 1985]
  A)
                  Equilibrium constant changes with addition of catalyst done clear
  B)
                  Catalyst increases the rate of forward reaction done clear
  C)
                  The ratio of mixture at equilibrium is not changed by catalyst done clear
  D)
                  Catalyst are active only in solution done clear
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• question_answer11)
  According to Le-chatelier principle, if heat is given to solid-liquid system, then    [MNR 1990]
  A)
                  Quantity of solid will reduce done clear
  B)
                  Quantity of liquid will reduce done clear
  C)
                  Increase in temperature done clear
  D)
                  Decrease in temperature done clear
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• question_answer12)
  In the reaction \[A(g)+2B(g)\] ⇌ \[C(g)+Q\,kJ\], greater product will be obtained  or the forward reaction is favoured by [MNR 1988; MP PMT 1989, 97]
  A)
                  At high temperature and high pressure done clear
  B)
                  At high temperature and low pressure done clear
  C)
                  At low temperature and high pressure done clear
  D)
                  At low temperature and low pressure done clear
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• question_answer13)
  Following gaseous reaction is undergoing in a vessel \[{{C}_{2}}{{H}_{4}}+{{H}_{2}}\]⇌ \[{{C}_{2}}{{H}_{6}}\]; \[\Delta H=-32.7\,Kcal\]                 Which will increase the equilibrium concentration of \[{{C}_{2}}{{H}_{6}}\] [IIT 1984; MP PET/PMT 1988; MADT Bihar 1995]
  A)
                  Increase of temperature done clear
  B)
                  By reducing temperature done clear
  C)
                  By removing some hydrogen done clear
  D)
                  By adding some \[{{C}_{2}}{{H}_{6}}\] done clear
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• question_answer14)
  The effect of increasing the pressure on the equilibrium  \[2A+3B\]⇌\[3A+2B\] is      [EAMCET 1980; MP PMT 1991]
  A)
                  Forward reaction is favoured done clear
  B)
                  Backward reaction is favoured done clear
  C)
                  No effect done clear
  D)
                  None of the above done clear
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• question_answer15)
  For the equilibrium \[2N{{O}_{2}}(g)\] ⇌ \[{{N}_{2}}{{O}_{4}}(g)\] \[+14.6\,kcal\] the increase in temperature would     [CPMT 1974, 78]
  A)
                  Favour the formation of \[{{N}_{2}}{{O}_{4}}\] done clear
  B)
                  Favour the decomposition of \[{{N}_{2}}{{O}_{4}}\] done clear
  C)
                  Not alter the equilibrium done clear
  D)
                  Stop the reaction done clear
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• question_answer16)
  Which of the following factors will favour the reverse reaction in a chemical equilibrium                [AIIMS  1982]
  A)
                  Increase in the concentration of one of the reactants done clear
  B)
                  Removal of at least one of the product at regular time intervals done clear
  C)
                  Increase in the concentration of one or more products done clear
  D)
                  None of these done clear
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• question_answer17)
  In the formation of \[S{{O}_{3}}\] by contact process, the conditions used are                                    [CPMT 1984]
  A)
                  Catalyst, optimum temperature and higher concentration of reactants done clear
  B)
                  Catalyst, optimum temperature and lower concentration of reactants done clear
  C)
                  Catalyst, high temperature and higher concentration of reactants done clear
  D)
                  Catalyst, low temperature and lower concentration of reactants done clear
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• question_answer18)
  Given reaction is \[2{{X}_{(gas)}}+{{Y}_{(gas)}}\] ⇌ \[2{{Z}_{(gas)}}+80\,kcal\] Which combination of pressure and temperature gives the highest yield of Z at equilibrium         [NCERT 1979]
  A)
                  1000 atm and \[{{500}^{o}}C\] done clear
  B)
                  500 atm and \[{{500}^{o}}C\] done clear
  C)
                  1000 atm and \[{{100}^{o}}C\] done clear
  D)
                  500 atm and \[{{100}^{o}}C\] done clear
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• question_answer19)
  Consider the reaction \[HC{{N}_{(aq)}}\] ⇌ \[H_{(aq)}^{+}+CN_{(aq)}^{-}\] . At equilibrium, the addition of \[CN_{(aq)}^{-}\] would             [NCERT 1979]
  A)
                  Reduce \[HC{{N}_{(aq)}}\] concentration done clear
  B)
                  Decrease the \[H_{(aq)}^{+}\] ion concentration done clear
  C)
                  Increase the equilibrium constant done clear
  D)
                  Decrease the equilibrium constant done clear
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• question_answer20)
  In the gaseous equilibrium \[{{H}_{2}}{{X}_{2}}+\] heat ⇌  \[2HX\], the formation of \[HX\] will be favoured by [CPMT 1977]
  A)
                  High pressure and low temperature done clear
  B)
                  High temperature and low pressure done clear
  C)
                  Low temperature and low pressure done clear
  D)
                  High temperature and high pressure done clear
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• question_answer21)
  Raising the temperature of an equilibrium system [MP PMT 1987]
  A)
                  Favours the exothermic reaction only done clear
  B)
                  Favours the endothermic reaction only done clear
  C)
                  Favours both the exothermic and endothermic reactions done clear
  D)
                  Favours neither the exothermic nor endothermic reactions done clear
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• question_answer22)
  Reaction in which yield of product will increase with increase in pressure is                                          [NCERT 1984]
  A)
                  \[{{H}_{2(g)}}+{{I}_{2(g)}}\] ⇌ \[2H{{I}_{(g)}}\] done clear
  B)
                  \[{{H}_{2}}{{O}_{(g)}}+C{{O}_{(g)}}\] ⇌ \[C{{O}_{2(g)}}+{{H}_{2(g)}}\] done clear
  C)
                  \[{{H}_{2}}{{O}_{(g)}}+{{C}_{(s)}}\] ⇌ \[C{{O}_{(g)}}+{{H}_{2(g)}}\] done clear
  D)
                  \[C{{O}_{(g)}}+3{{H}_{2(g)}}\] ⇌  \[C{{H}_{4(g)}}+{{H}_{2}}{{O}_{(g)}}\] done clear
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• question_answer23)
  In reaction \[{{N}_{2(g)}}+3{{H}_{2(g)}}\] ⇌ \[2N{{H}_{3(g)}};\,\Delta H=-93.6\,kJ\], the yield of ammonia does not increase when  [CPMT 1988]
  A)
                  Pressure is increased done clear
  B)
                  Temperature is lowered done clear
  C)
                  Pressure is lowered done clear
  D)
                  Volume of the reaction vessel is decreased done clear
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• question_answer24)
  The equilibrium which remains uneffected by change in pressure of the reactants is [CPMT 1987; KCET 1991; EAMCET 1992; MP PET 1992, 95; MP PMT 1999]
  A)
                  \[{{N}_{2(g)}}+{{O}_{2(g)}}\] ⇌ \[2N{{O}_{(g)}}\] done clear
  B)
                  \[2S{{O}_{2(g)}}+{{O}_{2(g)}}\] ⇌ \[2S{{O}_{3(g)}}\] done clear
  C)
                  \[2{{O}_{3(g)}}\]⇌ \[3{{O}_{2(g)}}\] done clear
  D)
                  \[2N{{O}_{2(g)}}\] ⇌ \[{{N}_{2}}{{O}_{4(g)}}\] done clear
  View Solution play_arrow

• question_answer25)
  The endothermic reaction \[(M+N\]D\[P)\] is allowed to attain an equilibrium at \[{{25}^{o}}\]. Formation of \[P\]  can be increased by      [BHU 1981]
  A)
                  Raising temperature done clear
  B)
                  Lowering temperature done clear
  C)
                  Keeping temperature constant done clear
  D)
                  Decreasing the concentration of \[M\] and \[N\] done clear
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• question_answer26)
  According to Le-chatelier's principle, an increase in the temperature of the following reaction will                 \[{{N}_{2}}+{{O}_{2}}\]⇌\[2NO-43,200\,kcal\]                      [MP PMT 1985, 93]
  A)
                  Increase the yield of \[NO\] done clear
  B)
                  Decrease the yield of \[NO\] done clear
  C)
                  Not effect the yield of \[NO\] done clear
  D)
                  Not help the reaction to proceed in forward direction done clear
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• question_answer27)
  In the  manufacture of \[N{{H}_{3}}\] by Haber's process, the condition which would give maximum yield is                 \[{{N}_{2}}+3{{H}_{2}}\]⇌ \[2N{{H}_{3}}+Q\,kcal\] [NCERT 1978; EAMCET 1980; MNR 1987; AFMC 1999;  CPMT 1983, 84, 86, 94; MP PMT 1999]
  A)
                  High temperature, high pressure and high concentrations of the reactants done clear
  B)
                  High temperature, low pressure and low concentrations of the reactants done clear
  C)
                  Low temperature and high pressure done clear
  D)
                  Low temperature, low pressure and low concentration of \[{{H}_{2}}\] done clear
  View Solution play_arrow

• question_answer28)
  Suppose the reaction \[PC{{l}_{5(s)}}\]⇌ \[PC{{l}_{3(s)}}+C{{l}_{2(g)}}\] is in a closed vessel at equilibrium stage. What is the effect on equilibrium concentration of \[C{{l}_{2(g)}}\] by adding \[PC{{l}_{5}}\] at constant temperature     [MP PMT 1992]
  A)
                  Decreases done clear
  B)
                  Increases done clear
  C)
                  Unaffected done clear
  D)
                  Cannot be described without the value of \[{{K}_{p}}\] done clear
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• question_answer29)
  In which of the following equilibrium reactions, the equilibrium would shift to the right, if total pressure is increased       [KCET 1993]
  A)
                  \[{{N}_{2}}+3{{H}_{2}}\]⇌ \[2N{{H}_{3}}\]           done clear
  B)
                  \[{{H}_{2}}+{{I}_{2}}\]⇌ \[2HI\] done clear
  C)
                  \[{{H}_{2}}+C{{l}_{2}}\] ⇌ \[2HCl\] done clear
  D)
                  \[{{N}_{2}}{{O}_{4}}\]⇌ \[2NO\] done clear
  View Solution play_arrow

• question_answer30)
  In which of the following gaseous equilibrium an increase in pressure will increase the yield of the products [EAMCET 1988]
  A)
                  \[2HI\]⇌\[{{H}_{2}}+{{I}_{2}}\]            done clear
  B)
                  \[2S{{O}_{2}}+{{O}_{2}}\]⇌\[2S{{O}_{3}}\] done clear
  C)
                  \[{{H}_{2}}+B{{r}_{2}}\]⇌\[2HBr\]       done clear
  D)
                  \[{{H}_{2}}O+CO\]⇌\[{{H}_{2}}+C{{O}_{2}}\] done clear
  View Solution play_arrow

• question_answer31)
  In the reaction \[A(g)+B(g)\] ⇌ \[C(g)\], the  backward reaction is favoured by [EAMCET 1986]
  A)
                  Decrease of pressure     done clear
  B)
                  Increase of pressure done clear
  C)
                  Either of the two              done clear
  D)
                  None of the two done clear
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• question_answer32)
  The formation of \[N{{O}_{2}}\] in the reaction \[2NO+{{O}_{2}}\]⇌\[2N{{O}_{2}}\]+ heat is favoured by [Rookee Qualifying 1998]
  A)
                  Low pressure     done clear
  B)
                  High pressure done clear
  C)
                  Low temperature            done clear
  D)
                  Reduction in the mass of done clear
  View Solution play_arrow

• question_answer33)
  For the reaction \[PC{{l}_{5}}(g)\]⇌ \[PC{{l}_{3}}(g)+C{{l}_{2}}(g)\], the forward reaction at constant temperature is favoured by [IIT 1991; AMU 2001]
  A)
                  Introducing an inert gas at constant volume done clear
  B)
                  Introducing chlorine gas at constant volume done clear
  C)
                  Introducing an inert gas at constant pressure done clear
  D)
                  Decreasing the volume of the container done clear
  View Solution play_arrow

• question_answer34)
  Which of the following conditions is favourable for the production of ammonia by Haber's process [MP PET 1994]
  A)
                  High concentration of reactants done clear
  B)
                  Low temperature and high pressure done clear
  C)
                  Continuous removal of ammonia done clear
  D)
                  All of these done clear
  View Solution play_arrow

• question_answer35)
  According to Le-chatelier's principle, which of the following factors influence a chemical system                [MP PMT 1996]
  A)
                  Concentration only done clear
  B)
                  Pressure only done clear
  C)
                  Temperature only done clear
  D)
                  Concentration, pressure and temperature done clear
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• question_answer36)
  If pressure increases then its effect on given equilibrium \[C(s)+{{H}_{2}}O(g)\]⇌\[CO(g)+{{H}_{2}}(g)\] it is satisfied in [BCECE 2005]
  A)
                  Forward direction            done clear
  B)
                  Backward direction done clear
  C)
                  No effect             done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer37)
  The exothermic formation of \[Cl{{F}_{3}}\] is represented by the equation \[C{{l}_{2(g)}}+3{{F}_{2(g)}}\] ⇌ \[2Cl{{F}_{3(g)}}\]; \[\Delta H=-329\,kJ\] Which of the following will increase the quantity of \[Cl{{F}_{3}}\] in an equilibrium mixture of \[C{{l}_{2}},\,{{F}_{2}}\] and \[Cl{{F}_{3}}\]    [AIEEE 2005]
  A)
                  Increasing the temperature        done clear
  B)
                  Removing \[C{{l}_{2}}\] done clear
  C)
                  Increasing the volume of the container done clear
  D)
                  Adding \[{{F}_{2}}\] done clear
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• question_answer38)
  What would happen to a reversible reaction at equilibrium when an inert gas is added while the pressure remains unchanged                                         [MP PMT 1997]
  A)
                  More of the product will be formed done clear
  B)
                  Less of the product will be formed done clear
  C)
                  More of the reactants will be formed done clear
  D)
                  It remains unaffected done clear
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• question_answer39)
  Formation of \[S{{O}_{3}}\] takes place according to the reaction \[2S{{O}_{2}}+{{O}_{2}}\]D \[2S{{O}_{3}};\Delta H=-45.2\,kcal\] Which of the following factors favours the formation of \[S{{O}_{3}}\] [MP PET/PMT 1998]
  A)
                  Increase in temperature done clear
  B)
                  Increase in pressure done clear
  C)
                  Removal of oxygen done clear
  D)
                  Increase in volume done clear
  View Solution play_arrow

• question_answer40)
  For the chemical reaction \[3X(g)+Y(g)\]⇌\[{{X}_{3}}Y(g)\], the amount of \[{{X}_{3}}Y\] at equilibrium is affected by [IIT 1999]
  A)
                  Temperature and pressure done clear
  B)
                  Temperature only done clear
  C)
                  Pressure only done clear
  D)
                  Temperature, pressure and catalyst                 done clear
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• question_answer41)
  In \[{{N}_{2}}+3{{H}_{2}}\]⇌\[2N{{H}_{3}}\] reversible reaction, increase in pressure will favour          [DPMT 1996]
  A)
                  Reaction in forward direction done clear
  B)
                  Reaction in reverse direction done clear
  C)
                  Will not exert any effect done clear
  D)
                  In backward and forward direction equally done clear
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• question_answer42)
  In the reaction \[{{N}_{2}}+3{{H}_{2}}\to 2N{{H}_{3}}\], the product increases on                             [Bihar MEE 1996]
  A)
                  Increasing temperature done clear
  B)
                  Increasing pressure done clear
  C)
                  Increasing temperature and pressure both done clear
  D)
                  Decreasing temperature and pressure both done clear
  E)
                  None of these done clear
  View Solution play_arrow

• question_answer43)
  In which of the following system, doubling the volume of the container cause a shift to the right               [AIIMS 1996]
  A)
                  \[{{H}_{2}}(g)+C{{l}_{2}}(g)=2HCl(g)\] done clear
  B)
                  \[2CO(g)+{{O}_{2}}(g)=2C{{O}_{2}}(g)\] done clear
  C)
                  \[{{N}_{2}}(g)+3{{H}_{2}}(g)=2N{{H}_{3}}(g)\] done clear
  D)
                  \[PC{{l}_{5}}(g)\]⇌\[PC{{l}_{3}}(g)+C{{l}_{2}}(g)\] done clear
  View Solution play_arrow

• question_answer44)
  Which of the following information can be obtained on the basis of Le-chatelier's principle [AIIMS 1998; Pb. PMT 1999; BHU 2000; DPMT 2004]
  A)
                  Entropy change in a reaction done clear
  B)
                  Dissociation constant of a weak acid done clear
  C)
                  Equilibrium constant of a chemical reaction done clear
  D)
                  Shift in equilibrium position on changing value of a constant done clear
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• question_answer45)
  The equilibrium \[2S{{O}_{2(g)}}+{{O}_{2(g)}}\]⇌\[2S{{O}_{3(g)}}\] shifts forward, if [CPMT 1988]
  A)
                  A catalyst is used done clear
  B)
                  An adsorbent is used to remove \[S{{O}_{3}}\] as soon as it is formed done clear
  C)
                  Low pressure done clear
  D)
                  Small amounts of reactants are used done clear
  View Solution play_arrow

• question_answer46)
  The equilibrium \[S{{O}_{2}}C{{l}_{2(g)}}\]⇌\[S{{O}_{2(g)}}+C{{l}_{2(g)}}\] is attained at 25°C in a closed container and an inert gas helium is introduced which of the following statement is correct       [MP PMT 2000]
  A)
                  More chlorine is formed               done clear
  B)
                  Concentration of \[S{{O}_{2}}\] is reduced done clear
  C)
                  More \[S{{O}_{2}}C{{l}_{2}}\] is formed done clear
  D)
                  Concentration of \[S{{O}_{2}}C{{l}_{2}},\,S{{O}_{2}}\] and \[C{{l}_{2}}\] does not change done clear
  View Solution play_arrow

• question_answer47)
  Which of the following equilibria will shift to right side on increasing the temperature     [MP PMT 2000]
  A)
                  \[C{{O}_{(g)}}+{{H}_{2}}{{O}_{(g)}}\]⇌\[C{{O}_{2}}_{(g)}+{{H}_{2}}_{(g)}\] done clear
  B)
                  \[2S{{O}_{2}}_{(g)}+{{O}_{2}}_{(g)}\]⇌\[2S{{O}_{3}}_{(g)}\] done clear
  C)
                  \[{{H}_{2}}{{O}_{(g)}}\]⇌\[{{H}_{2}}_{(g)}+\frac{1}{2}{{({{O}_{2}})}_{(g)}}\] done clear
  D)
                  \[4HC{{l}_{(g)}}+{{O}_{2}}_{(g)}\]⇌\[2{{H}_{2}}{{O}_{(g)}}+2C{{l}_{2}}_{(g)}\] done clear
  View Solution play_arrow

• question_answer48)
  Sodium sulphate dissolves in water with evolution of heat. Consider a saturated solution of sodium sulphate. If the temperature is raised, then according to Le-Chatelier principle                                   [MP PET 2000]
  A)
                  More solid will dissolve done clear
  B)
                  Some solid will precipitate out from the solution done clear
  C)
                  The solution will become supersaturated done clear
  D)
                  Solution concentration will remain unchanged done clear
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• question_answer49)
  Consider the equilibrium \[{{N}_{2}}(g)+3{{H}_{2}}(g)\]⇌\[2N{{H}_{3}}(g)\]; \[\Delta \]H = ? 93.6 KJ. The maximum yield of ammonia is obtained by [UPSEAT 1999; AMU 2000]
  A)
                  Decrease of temp. and increase of pressure done clear
  B)
                  Increase of temp. and decrease of pressure done clear
  C)
                  Decrease of both the temp. and pressure done clear
  D)
                  Increase of both the temp. and pressure done clear
  View Solution play_arrow

• question_answer50)
  In the equilibrium \[AB\]⇌\[A+B\]; if the equilibrium concentration of A is doubled, the equilibrium concentration of B would become:                [AMU 2000]
  A)
                  Twice    done clear
  B)
                  Half done clear
  C)
                  1/4th       done clear
  D)
                  1/8th done clear
  View Solution play_arrow

• question_answer51)
  Le-Chatelier?s principle is applicable only to a [MP PET/PMT 1988; KCET 1999; AFMC 2000; Pb. CET 2002]
  A)
                  System in equilibrium    done clear
  B)
                  Irreversible reaction done clear
  C)
                  Homogeneous reaction                done clear
  D)
                  Heterogeneous reaction done clear
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• question_answer52)
  In a vessel containing \[S{{O}_{3}},\,S{{O}_{2}}\] and \[{{O}_{2}}\] at equilibrium, some helium gas is introduced so that the total pressure increases while temperature and volume remain constant. According to Le?Chatelier principle the dissociation of \[S{{O}_{3}}\] [UPSEAT 2000]
  A)
                  Increases             done clear
  B)
                  Decreases done clear
  C)
                  Remains unaltered          done clear
  D)
                  Changes unpredictably done clear
  View Solution play_arrow

• question_answer53)
  \[{{H}_{2(g)}}+{{I}_{2(g)}}\]⇌\[2H{{I}_{(g)}}\,\,\,\Delta H=+q\]cal, then formation of HI:          [AMU 2000]
  A)
                  Is favoured by lowering the temperature  done clear
  B)
                  Is favoured by increasing the pressure done clear
  C)
                  Is unaffected by change in pressure done clear
  D)
                  Is unaffected by change in temperature done clear
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• question_answer54)
  In which of the following equilibrium systems is the rate of the backward reaction favoured by increase of pressure [KCET 2001]
  A)
                  \[PC{{l}_{5}}\]⇌\[PC{{l}_{3}}+C{{l}_{2}}\]      done clear
  B)
                  \[2S{{O}_{2}}+{{O}_{2}}\]⇌\[2S{{O}_{3}}\] done clear
  C)
                  \[{{N}_{2}}+3{{H}_{2}}\]⇌\[2N{{H}_{3}}\]       done clear
  D)
                  \[{{N}_{2}}+{{O}_{2}}\]⇌\[2NO\] done clear
  View Solution play_arrow

• question_answer55)
  Which of the following equilibrium is not shifted by increase in the pressure                                       [MP PMT 2001]
  A)
                  \[{{H}_{2}}_{(g)}+{{I}_{2}}_{(g)}\]⇌\[2H{{I}_{(g)}}\] done clear
  B)
                  \[{{N}_{2(g)}}+3{{H}_{2(g)}}\]⇌\[2N{{H}_{3}}_{(g)}\] done clear
  C)
                  \[2C{{O}_{(g)}}+{{O}_{2}}_{(g)}\]⇌\[2C{{O}_{2}}_{(g)}\] done clear
  D)
                  \[2{{C}_{(S)}}+{{O}_{2(g)}}\]⇌\[2C{{O}_{(g)}}\] done clear
  View Solution play_arrow

• question_answer56)
  According to Le?Chatelier?s principal adding heat to a solid and liquid in equilibrium with endothermic nature will cause the                 [JIPMER 2000; MP PET 2001]
  A)
                  Temperature to rise done clear
  B)
                          Temperature to fall done clear
  C)
                  Amount of solid to decrease done clear
  D)
                  Amount of liquid to decrease done clear
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• question_answer57)
  On addition of an inert gas at constant volume to the reaction \[{{N}_{2}}+3{{H}_{2}}\]⇌\[2N{{H}_{3}}\]at equilibrium [Pb. PMT 2001]
  A)
                  The reaction remains unaffected done clear
  B)
                  Forward reaction is favoured done clear
  C)
                  The reaction halts done clear
  D)
                  Backward reaction is favoured done clear
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• question_answer58)
  Le-Chatelier principle is not applicable to              [MH CET 2001]
  A)
                  \[{{H}_{2(g)}}+{{I}_{2(g)}}\] ⇌\[2H{{I}_{(g)}}\] done clear
  B)
                          \[F{{e}_{(S)}}+{{S}_{(S)}}\] ⇌\[Fe{{S}_{(S)}}\] done clear
  C)
                  \[{{N}_{2(g)}}+3{{H}_{2(g)}}\]⇌\[2N{{H}_{3(g)}}\] done clear
  D)
                  \[{{N}_{2(g)}}+{{O}_{2(g)}}\]⇌\[2N{{O}_{(g)}}\] done clear
  View Solution play_arrow

• question_answer59)
  For the reaction: A + B + Q ⇌ C + D, if the temperature is increased, then concentration of the products will [AFMC 2001]
  A)
                  Increase               done clear
  B)
                          Decrease done clear
  C)
                  Remain same     done clear
  D)
                  Become Zero done clear
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• question_answer60)
  \[{{H}_{2(g)}}\]+ \[{{I}_{2(g)}}\] ⇌\[2H{{I}_{(g)}}\] In this reaction when pressure increases, the reaction direction                [RPMT 2002]
  A)
                  Does not change              done clear
  B)
                          Forward done clear
  C)
                  Backward            done clear
  D)
                  Decrease done clear
  View Solution play_arrow

• question_answer61)
  The rate of reaction of which of the following is not affected by pressure                                             [MP PMT 2002]
  A)
                  \[PC{{l}_{3}}+C{{l}_{2}}\]⇌\[PC{{l}_{5}}\]         done clear
  B)
                  \[{{N}_{2}}+3{{H}_{2}}\]⇌\[2N{{H}_{3}}\] done clear
  C)
                  \[{{N}_{2}}+{{O}_{2}}\]⇌ 2NO  done clear
  D)
                  \[2S{{O}_{2}}+{{O}_{2}}\]⇌\[2S{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer62)
  In the equilibrium N2 + 3H2 ⇌ 2NH3 + 22 kcal, the formation of ammonia is favoured by  [MP PET 2000, 02]
  A)
                  Increasing the pressure                done clear
  B)
                          Increasing the temperature            done clear
  C)
                  Decreasing the pressure               done clear
  D)
   Adding ammonia done clear
  View Solution play_arrow

• question_answer63)
  The reaction \[2S{{O}_{2}}+{{O}_{2}}\]⇌\[2S{{O}_{3}}\]; \[\Delta H\] = ? ve is favoured by      [CPMT 2002; Pb. PMT 2001]
  A)
                  Low temperature, low pressure done clear
  B)
                          Low temperature, high pressure done clear
  C)
                  High temperature, high pressure done clear
  D)
                  High temperature, low pressure done clear
  View Solution play_arrow

• question_answer64)
  Which of the following will favour the reverse reaction in a chemical equilibrium               [Kerala (Med.) 2002]
  A)
                  Increasing the concentration of the reactants done clear
  B)
                          Removal of at least one of the products at regular intervals done clear
  C)
                  Increasing the concentration of one or more of the products done clear
  D)
                  Increasing the pressure done clear
  E)
                  None of these done clear
  View Solution play_arrow

• question_answer65)
  Under what conditions of temperature and pressure the formation of atomic hydrogen from molecular hydrogen will be favoured most  [UPSEAT 2000, 01, 02]
  A)
                  High temperature and high pressure done clear
  B)
                          Low temperature and low pressure done clear
  C)
                  High temperature and low pressure done clear
  D)
                  Low temperature and high pressure done clear
  View Solution play_arrow

• question_answer66)
  The formation of nitric oxide by contact process \[{{N}_{2}}+{{O}_{2}}\] ⇌ 2NO. \[\Delta \]H = 43.200 kcal is favoured by [AMU 2002]
  A)
                  Low temperature and low pressure done clear
  B)
                          Low temperature and high pressure done clear
  C)
                  High temperature and high pressure done clear
  D)
                  High temperature and excess reactants concentration done clear
  View Solution play_arrow

• question_answer67)
  The chemical reaction: \[Ba{{O}_{2(S)}}\]⇌\[Ba{{O}_{(s)}}\]\[+{{O}_{2(g)}}\]? \[\Delta \]H = + ve. In equilibrium condition, pressure of O2 depends upon [CBSE PMT 2002]
  A)
                  Increase mass of BaO    done clear
  B)
                          Increase mass of BaO2    done clear
  C)
                  Increase in temperature done clear
  D)
                  Increase mass of BaO2 and BaO both done clear
  View Solution play_arrow

• question_answer68)
  The yield of product in the reaction \[{{A}_{2(g)}}\]+ \[2{{B}_{\left( g \right)}}\]⇌ \[{{C}_{(g)}}\]+ Q.kJ. would be high at [UPSEAT 2002]
  A)
                  High temperature and high pressure done clear
  B)
                  High temperature and low pressure done clear
  C)
                  Low temperature and high pressure done clear
  D)
                  Low temperature and low pressure done clear
  View Solution play_arrow

• question_answer69)
  Which reaction is not effected by change in pressure [UPSEAT 2003]
  A)
                  \[{{H}_{2}}+{{I}_{2}}\]⇌\[2HI\]              done clear
  B)
                  \[2C+{{O}_{2}}\]⇌ 2CO done clear
  C)
                  \[{{N}_{2}}+3{{H}_{2}}\]⇌\[2N{{H}_{3}}\]       done clear
  D)
                  \[PC{{l}_{5}}\]⇌\[PC{{l}_{3}}+C{{l}_{2}}\] done clear
  View Solution play_arrow

• question_answer70)
  The gaseous reaction A + B ⇌ 2C + D; + Q is most favoured at     [Karnataka CET 2003]
  A)
                  Low temperature and high pressure done clear
  B)
                  High temperature and high pressure done clear
  C)
                  High temperature and low pressure done clear
  D)
                  Low temperature and low pressure done clear
  View Solution play_arrow

• question_answer71)
  For a reaction if \[{{K}_{p}}>{{K}_{c}}\], the forward reaction is favoured by        [RPET 2003]
  A)
                  Low pressure     done clear
  B)
                  High pressure done clear
  C)
                  High temperature            done clear
  D)
                  Low temperature done clear
  View Solution play_arrow

• question_answer72)
  \[{{A}_{2(g)}}+{{B}_{2(g)}}\]⇌\[2A{{B}_{(g)}}\]; \[\Delta H=+ve\]  [BHU 2003]
  A)
                  Unaffected by pressure done clear
  B)
                          It occurs at 1000 pressure done clear
  C)
                  It occurs at high temperature done clear
  D)
                  It occurs at high pressure and high temperature done clear
  View Solution play_arrow

• question_answer73)
  Consider the reaction equilibrium, \[2S{{O}_{2(g)}}\]+\[{{O}_{2(g)}}\]⇌\[2S{{O}_{3(g)}}\]; \[\Delta H{}^\circ \]= ?198kJ. On the basis of Le-Chatelier?s principle, the condition favorable for the forward reaction is                                           [AIEEE 2003]
  A)
                  Lowering of temperature as well as pressure done clear
  B)
                  Increasing temperature as well as pressure done clear
  C)
                  Lowering the temperature and increasing the pressure                 done clear
  D)
                  Any value of temperature and pressure done clear
  View Solution play_arrow