JEE Main & Advanced Chemistry Equilibrium / साम्यावस्था Question Bank

done Kp and Kc Relationship and Characteristics of K Total Questions - 69

• question_answer1)
  In which of the following reaction, the value of \[{{K}_{p}}\] will be equal to \[{{K}_{c}}\]                                              [MP PMT 1995]
  A)
                  \[{{H}_{2}}+{{I}_{2}}\]⇌ \[2HI\]                done clear
  B)
                  \[PC{{l}_{5}}\] ⇌ \[PC{{l}_{3}}+C{{l}_{2}}\] done clear
  C)
                  \[2N{{H}_{3}}\] ⇌ \[{{N}_{2}}+3{{H}_{2}}\] done clear
  D)
                  \[2S{{O}_{2}}+{{O}_{2}}\]⇌\[2S{{O}_{3}}\] done clear
  View Solution play_arrow

• question_answer2)
  Equilibrium constants \[{{K}_{1}}\]and \[{{K}_{2}}\]for the following equilibria \[NO(g)+\frac{1}{2}{{O}_{2}}\] \[\overset{{{K}_{1}}}{leftrightarrows}\]  \[N{{O}_{2}}(g)\] and \[2N{{O}_{2}}(g)\] \[\overset{{{K}_{2}}}{leftrightarrows}\] \[2NO(g)+{{O}_{2}}(g)\] are related as  [CBSE PMT 2005]
  A)
                  \[{{K}_{2}}=\frac{1}{{{K}_{1}}}\]                done clear
  B)
                  \[{{K}_{2}}=K_{1}^{2}\] done clear
  C)
                  \[{{K}_{2}}=\frac{{{K}_{1}}}{2}\]                done clear
  D)
                  \[{{K}_{2}}=\frac{1}{K_{1}^{2}}\] done clear
  View Solution play_arrow

• question_answer3)
  For the reaction \[PC{{l}_{3}}(g)+C{{l}_{2}}(g)\] ⇌ \[PC{{l}_{5}}(g)\]  at  \[{{250}^{o}}C\], the value of \[{{K}_{c}}\] is 26, then the value of \[{{K}_{p}}\] on the same temperature will be                  [MNR 1990; MP PET 2001]
  A)
                  0.61        done clear
  B)
                  0.57 done clear
  C)
                  0.83        done clear
  D)
                  0.46 done clear
  View Solution play_arrow

• question_answer4)
  The relation between equilibrium constant \[{{K}_{p}}\] and \[{{K}_{c}}\] is         [IIT 1994; MP PMT 1994; CPMT 1997; AMU 2000; RPMT 2000, 02;MP PET 2002; Kerala PMT 2002]
  A)
                  \[{{K}_{c}}={{K}_{p}}\,{{(RT)}^{\Delta n}}\]          done clear
  B)
                  \[{{K}_{p}}={{K}_{c}}{{(RT)}^{\Delta n}}\] done clear
  C)
                  \[{{K}_{p}}={{\left( \frac{{{K}_{c}}}{RT} \right)}^{\Delta n}}\]       done clear
  D)
                  \[{{K}_{p}}-{{K}_{c}}={{(RT)}^{\Delta n}}\] done clear
  View Solution play_arrow

• question_answer5)
  \[C{{H}_{3}}COO{{H}_{(l)}}+{{C}_{2}}{{H}_{5}}O{{H}_{(l)}}\] ⇌ \[C{{H}_{3}}COO{{C}_{2}}{{H}_{5\,(l)}}+{{H}_{2}}{{O}_{(l)}}\]  In the above reaction, one mole of each of acetic acid and alcohol are heated in the presence of little conc. \[{{H}_{2}}S{{O}_{4}}\]. On equilibrium being attained [CPMT 1985; MP PET 1992]
  A)
                  1 mole of ethyl acetate is formed done clear
  B)
                  2 mole of ethyl acetate are formed done clear
  C)
                  1/2 moles of ethyl acetate is formed done clear
  D)
                  2/3 moles of ethyl acetate is formed done clear
  View Solution play_arrow

• question_answer6)
  If the equilibrium constant of the reaction \[2HI\] ⇌ \[{{H}_{2}}+{{I}_{2}}\] is 0.25, then the equilibrium constant of the reaction \[{{H}_{2}}+{{I}_{2}}\]⇌ \[2HI\] would be          [MP PMT 1989, 95]
  A)
                  1.0          done clear
  B)
                  2.0 done clear
  C)
                  3.0          done clear
  D)
                  4.0 done clear
  View Solution play_arrow

• question_answer7)
  For \[{{N}_{2}}+3{{H}_{2}}\] ⇌ \[2N{{H}_{3}}+\] heat [CPMT 1990; MP PMT 1997; RPMT 1999; MP PET 2000; KCET 2001]
  A)
                  \[{{K}_{p}}={{K}_{c}}(RT)\]          done clear
  B)
                  \[{{K}_{p}}={{K}_{c}}(RT)\] done clear
  C)
                  \[{{K}_{p}}={{K}_{c}}\,{{(RT)}^{-2}}\]      done clear
  D)
                  \[{{K}_{p}}={{K}_{c}}\,{{(RT)}^{-1}}\] done clear
  View Solution play_arrow

• question_answer8)
  In the reaction \[{{N}_{2}}(g)+3{{H}_{2}}\] ⇌ \[2N{{H}_{3}}(g)\], the value of the equilibrium constant depends on [CPMT 1990; AIIMS 1991; MP PET 1996]
  A)
                  Volume of the reaction vessel done clear
  B)
                  Total pressure of the system done clear
  C)
                  The initial concentration of nitrogen and hydrogen done clear
  D)
                  The temperature done clear
  View Solution play_arrow

• question_answer9)
  For the chemical equilibrium, \[CaC{{O}_{3}}(s)\] ⇌ \[CaO(s)+C{{O}_{2}}(g),\ \Delta H_{r}^{{}^\circ }\] can be determined from which one of the following plots      [AIIMS 2005]
  A)
             done clear
  B)
    done clear
  C)
         done clear
  D)
    done clear
  View Solution play_arrow

• question_answer10)
  In which of the following equilibria, the value of \[{{K}_{p}}\] is less than \[{{K}_{c}}\]                                     [MP PMT 1993]
  A)
                  \[{{H}_{2}}+{{I}_{2}}\]⇌ \[2HI\] done clear
  B)
                  \[{{N}_{2}}+3{{H}_{2}}\]⇌\[2N{{H}_{3}}\] done clear
  C)
                  \[{{N}_{2}}+{{O}_{2}}\]⇌ \[2NO\] done clear
  D)
                  \[CO+{{H}_{2}}O\]⇌ \[C{{O}_{2}}+{{H}_{2}}\] done clear
  View Solution play_arrow

• question_answer11)
  Two gaseous equilibria \[S{{O}_{2(g)}}+\frac{1}{2}{{O}_{2(g)}}\] ⇌ \[S{{O}_{3(g)}}\] and \[2S{{O}_{3(g)}}\]⇌\[2S{{O}_{2(g)}}+{{O}_{2(g)}}\] have equilibrium constants \[{{K}_{1}}\] and \[{{K}_{2}}\] respectively at \[298\,K\]. Which of the following relationships between \[{{K}_{1}}\] and \[{{K}_{2}}\] is correct [CPMT 1988; CBSE PMT 1989; MP PET 1993, 95; RPMT 1999; MP PMT 2001]
  A)
                  \[{{K}_{1}}={{K}_{2}}\]   done clear
  B)
                  \[{{K}_{2}}=K_{1}^{2}\] done clear
  C)
                  \[{{K}_{2}}=\frac{1}{K_{1}^{2}}\] done clear
  D)
                  \[{{K}_{2}}=\frac{1}{{{K}_{1}}}\] done clear
  View Solution play_arrow

• question_answer12)
  \[{{H}_{2}}+{{I}_{2}}\]⇌\[2HI\]                 In the above equilibrium system if the concentration of the reactants at \[{{25}^{o}}C\] is increased, the value of \[{{K}_{c}}\] will [BHU 1979; CPMT 1990; CBSE PMT 1990]
  A)
                  Increase done clear
  B)
                  Decrease done clear
  C)
                  Remains the same done clear
  D)
                  Depends on the nature of the reactants done clear
  View Solution play_arrow

• question_answer13)
  At a given temperature, the equilibrium constant for reaction \[PC{{l}_{5}}(g)\]⇌ \[PC{{l}_{3}}(g)+C{{l}_{2}}(g)\] is \[2.4\times {{10}^{-3}}\]. At the same temperature, the equilibrium constant for reaction \[PC{{l}_{3}}(g)+C{{l}_{2}}(g)\] ⇌ \[PC{{l}_{5}}(g)\] is          [KCET 1992]
  A)
                  \[2.4\times {{10}^{-3}}\]               done clear
  B)
                  \[-2.4\times {{10}^{-3}}\] done clear
  C)
                  \[4.2\times {{10}^{2}}\]                 done clear
  D)
                  \[4.8\times {{10}^{-2}}\] done clear
  View Solution play_arrow

• question_answer14)
  For the reaction \[C(s)+C{{O}_{2}}(g)\] ⇌ \[2CO(g)\], the partial pressure of \[C{{O}_{2}}\] and \[CO\] are 2.0 and 4.0 atm  respectively at equilibrium. The \[{{K}_{p}}\] for the reaction is [Roorkee 1990]
  A)
                  0.5          done clear
  B)
                  4.0 done clear
  C)
                  8.0          done clear
  D)
                  32.0 done clear
  View Solution play_arrow

• question_answer15)
  \[K\] for the synthesis of \[HI\] is 50. \[K\] for dissociation of \[HI\] is     [Roorkee 1990]
  A)
                  50           done clear
  B)
                  5 done clear
  C)
                  0.2          done clear
  D)
                  0.02 done clear
  View Solution play_arrow

• question_answer16)
  In which one of the following gaseous equilibria \[{{K}_{p}}\] is less than \[{{K}_{c}}\]     [EAMCET 1989; MP PET 1994; Pb. PMT 2000; KCET 2001; CBSE PMT 2002]
  A)
                  \[{{N}_{2}}{{O}_{4}}\]⇌ \[2N{{O}_{2}}\]               done clear
  B)
                  \[2HI\]⇌\[{{H}_{2}}+{{I}_{2}}\] done clear
  C)
                  \[2S{{O}_{2}}+{{O}_{2}}\]⇌ \[2S{{O}_{3}}\]         done clear
  D)
                  \[{{N}_{2}}+{{O}_{2}}\] ⇌ \[2NO\] done clear
  View Solution play_arrow

• question_answer17)
  For which of the following reactions \[{{K}_{p}}={{K}_{c}}\] [KCET 1991; IIT 1991; EAMCET 1992; AIIMS 1996; KCET 2000; AMU 2000]
  A)
                  \[2NOCl(g)\]⇌\[2NO(g)+C{{l}_{2}}(g)\] done clear
  B)
                  \[{{N}_{2}}(g)+3{{H}_{2}}(g)\]⇌\[2N{{H}_{3}}(g)\] done clear
  C)
                  \[{{H}_{2}}(g)+C{{l}_{2}}(g)\] ⇌\[2HCl(g)\] done clear
  D)
                  \[{{N}_{2}}{{O}_{4}}(g)\] ⇌\[2N{{O}_{2}}(g)\] done clear
  View Solution play_arrow

• question_answer18)
  For the reaction \[{{H}_{2}}(g)+{{I}_{2}}(g)\]⇌ \[2HI(g)\] at \[721K\] the value of equilibrium constant \[({{K}_{c}})\] is 50. When the equilibrium  concentration of both is \[0.5\,M\], the value of \[{{K}_{p}}\] under the same conditions will be                 [CBSE PMT 1990]
  A)
                  0.002     done clear
  B)
                  0.2 done clear
  C)
                  50.0        done clear
  D)
                  \[50/RT\] done clear
  View Solution play_arrow

• question_answer19)
  In which of the following reaction \[{{K}_{p}}>{{K}_{c}}\]              [AFMC 1995]
  A)
                  \[{{N}_{2}}+3{{H}_{2}}\] ⇌ \[2N{{H}_{3}}\]          done clear
  B)
                  \[{{H}_{2}}+{{I}_{2}}\] ⇌\[2HI\] done clear
  C)
                  \[PC{{l}_{3}}+C{{l}_{2}}\] ⇌ \[PC{{l}_{5}}\]           done clear
  D)
                  \[2S{{O}_{3}}\]⇌\[{{O}_{2}}+2S{{O}_{2}}\] done clear
  View Solution play_arrow

• question_answer20)
  For the reaction \[PC{{l}_{5}}(g)\]⇌ \[PC{{l}_{3}}(g)+C{{l}_{2}}(g)\] [MP PET 1996]
  A)
                  \[{{K}_{p}}={{K}_{c}}\]   done clear
  B)
                  \[{{K}_{p}}={{K}_{c}}{{(RT)}^{-1}}\] done clear
  C)
                  \[{{K}_{p}}={{K}_{c}}(RT)\]          done clear
  D)
                  \[{{K}_{p}}={{K}_{c}}{{(RT)}^{2}}\] done clear
  View Solution play_arrow

• question_answer21)
  The equilibrium constant of the reaction \[{{H}_{2}}(g)+{{I}_{2}}(g)\] ⇌ \[2HI(g)\] is 64. If the volume of the container is reduced to one fourth of its original volume, the value of the equilibrium constant will be [MP PET 1996]
  A)
                  16           done clear
  B)
                  32 done clear
  C)
                  64           done clear
  D)
                  128 done clear
  View Solution play_arrow

• question_answer22)
  For the following gaseous reaction \[{{H}_{2}}+{{I}_{2}}\]⇌ \[2HI\], the equilibrium constant [MP PMT 1996; MP PET/PMT 1998]
  A)
                  \[{{K}_{p}}>{{K}_{c}}\]   done clear
  B)
                  \[{{K}_{p}}<{{K}_{c}}\] done clear
  C)
                  \[{{K}_{p}}={{K}_{c}}\]   done clear
  D)
                  \[{{K}_{p}}=1/{{K}_{c}}\] done clear
  View Solution play_arrow

• question_answer23)
  For the reaction \[2N{{O}_{2(g)}}\]⇌ \[2N{{O}_{(g)}}+{{O}_{2(g)}}\] \[({{K}_{c}}=1.8\times {{10}^{-6}}\,\text{at}\,\,184{}^\circ C)\] \[(R=0.0831\,kJ/\,(mol.\,K))\] When \[{{K}_{p}}\] and \[{{K}_{c}}\] are compared at 184°C it is found that          [AIEEE 2005]
  A)
                  \[{{K}_{p}}\] is greater than \[{{K}_{c}}\] done clear
  B)
                  \[{{K}_{p}}\] is less than \[{{K}_{c}}\] done clear
  C)
                  \[{{K}_{p}}={{K}_{e}}\] done clear
  D)
                  Whether \[{{K}_{p}}\] is greater than, less than or equal to \[{{K}_{c}}\] depends upon the total gas pressure done clear
  View Solution play_arrow

• question_answer24)
  In equilibrium \[C{{H}_{3}}COOH+{{H}_{2}}O\]⇌\[C{{H}_{3}}COO+H_{3}^{+}O\]                 The equilibrium constant may change when
  A)
                  \[C{{H}_{3}}CO{{O}^{-}}\] are added       done clear
  B)
                  \[C{{H}_{3}}COOH\]  is added done clear
  C)
                  Catalyst is added              done clear
  D)
                  Mixture is heated done clear
  View Solution play_arrow

• question_answer25)
  For reaction 2NOCl(g) ⇌ \[2NO(g)+C{{l}_{2}}(g)\], \[{{K}_{C}}\]at 427°C is \[3\times {{10}^{-6}}L\ mo{{l}^{-1}}\]. The value of \[{{K}_{P}}\] is nearly                [AIIMS 2005]
  A)
                  \[7.50\times {{10}^{-5}}\]             done clear
  B)
                  \[2.50\times {{10}^{-5}}\] done clear
  C)
                  \[2.50\times {{10}^{-4}}\]             done clear
  D)
                  \[1.75\times {{10}^{-4}}\] done clear
  View Solution play_arrow

• question_answer26)
  For which one of the following reactions \[{{K}_{p}}={{K}_{c}}\] [MP PET 1997]
  A)
                  \[{{N}_{2}}+3{{H}_{2}}\]⇌\[2N{{H}_{3}}\]       done clear
  B)
                  \[{{N}_{2}}+{{O}_{2}}\]⇌\[2NO\] done clear
  C)
                  \[PC{{l}_{5}}\]⇌\[PC{{l}_{3}}+C{{l}_{2}}\]      done clear
  D)
                  \[2S{{O}_{3}}\]⇌\[2S{{O}_{2}}+{{O}_{2}}\] done clear
  View Solution play_arrow

• question_answer27)
  The equilibrium constant for the reversible reaction, \[{{N}_{2}}+3{{H}_{2}}\] ⇌ \[2N{{H}_{3}}\] is \[K\] and for the reaction \[\frac{1}{2}{{N}_{2}}+\frac{3}{2}{{H}_{2}}\] ⇌ \[N{{H}_{3}}\] the equilibrium constant is \[{K}'\]. \[K\] and \[{K}'\] will be related as                            [MP PET 1997]
  A)
                  \[K={K}'\]            done clear
  B)
                  \[{K}'=\sqrt{K}\] done clear
  C)
                  \[K=\sqrt{{{K}'}}\]            done clear
  D)
                  \[K\times {K}'=1\] done clear
  View Solution play_arrow

• question_answer28)
  The equilibrium constant \[({{K}_{p}})\] for the reaction \[PC{{l}_{5}}(g)\to PC{{l}_{3}}(g)+C{{l}_{2}}(g)\] is 16. If the volume of the container is reduced to one half its original volume, the value of \[{{K}_{p}}\] for the reaction at the same temperature will be [KCET 1996]
  A)
                  32           done clear
  B)
                  64 done clear
  C)
                  16           done clear
  D)
                  4 done clear
  View Solution play_arrow

• question_answer29)
  \[2N{{O}_{2}}\]⇌\[2NO+{{O}_{2}};\,\,K=1.6\times {{10}^{-12}}\] \[NO+\frac{1}{2}{{O}_{2}}\]⇌\[N{{O}_{2}}{K}'=?\]                                     [CPMT 1996]
  A)
                  \[{K}'=\frac{1}{{{K}^{2}}}\]           done clear
  B)
                  \[{K}'=\frac{1}{K}\] done clear
  C)
                  \[{K}'=\frac{1}{\sqrt{K}}\]            done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer30)
  The value of \[{{K}_{p}}\] for the following reaction \[2{{H}_{2}}S(g)\]⇌\[2{{H}_{2}}(g)+{{S}_{2}}(g)\] is \[1.2\times {{10}^{-2}}\] at \[{{106.5}^{o}}C\]. The value of \[{{K}_{c}}\] for this reaction is [EAMCET 1997; AIIMS 1999; AFMC 2000; KCET 2001]
  A)
                  \[1.2\times {{10}^{-2}}\]               done clear
  B)
                  \[<1.2\times {{10}^{-2}}\] done clear
  C)
                  83           done clear
  D)
                  \[>1.2\times {{10}^{-2}}\] done clear
  View Solution play_arrow

• question_answer31)
  Which statement for equilibrium constant is true for the reaction  \[A+B\]⇌\[C\]           [CPMT 1997]
  A)
                  Not changes with temperature done clear
  B)
                  Changes when catalyst is added done clear
  C)
                  Increases with temperature done clear
  D)
                  Changes with temperature done clear
  View Solution play_arrow

• question_answer32)
  The equilibrium constant for the reaction \[{{N}_{2}}+3{{H}_{2}}\]⇌\[2N{{H}_{3}}\] is \[K,\] then the equilibrium constant for the equilibrium \[N{{H}_{3}}\]⇌\[\frac{1}{2}{{N}_{2}}+\frac{3}{2}{{H}_{2}}\] is [CBSE PMT 1996; UPSEAT 2001]
  A)
                  \[1/K\] done clear
  B)
                  \[1/{{K}^{2}}\] done clear
  C)
                  \[\sqrt{K}\]         done clear
  D)
                  \[\frac{1}{\sqrt{K}}\] done clear
  View Solution play_arrow

• question_answer33)
  Which of the following statements regarding a chemical equilibrium is wrong                                      [JIPMER 1999]
  A)
                  An equilibrium can be shifted by altering the temperature or pressure done clear
  B)
                  An equilibrium is dynamic done clear
  C)
                  The same state of equilibrium is reached whether one starts with the reactants or the products done clear
  D)
                  The forward reaction is favoured by the addition of a catalyst done clear
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• question_answer34)
  The reaction between \[{{N}_{2}}\] and \[{{H}_{2}}\] to form ammonia has \[{{K}_{c}}=6\times {{10}^{-2}}\] at the temperature 500°C. The numerical value of \[{{K}_{p}}\] for this reaction is          [UPSEAT 1999]
  A)
                  \[1.5\times {{10}^{-5}}\]               done clear
  B)
                  \[1.5\times {{10}^{5}}\]\[\] done clear
  C)
                  \[1.5\times {{10}^{-6}}\]               done clear
  D)
                  \[1.5\times {{10}^{6}}\] done clear
  View Solution play_arrow

• question_answer35)
  For the gaseous phase reaction                 2NO ⇌ \[{{N}_{2}}+{{O}_{2}}\,\,\,\,\Delta H{}^\circ =+\ 43.5\,\,kcal\,mo{{l}^{-1}}\] Which statement is correct                                          [MH CET 1999]
  A)
                  K varies with addition of NO done clear
  B)
                  K decrease as temperature decreases done clear
  C)
                  K Increases as temperature decreases done clear
  D)
                  K is independent of temperature done clear
  View Solution play_arrow

• question_answer36)
  For the reversible reaction, \[{{N}_{2(g)}}+3{{H}_{2(g)}}\] ⇌\[2N{{H}_{3(g)}}\] at 500°C, the value of \[{{K}_{P}}\] is \[1.44\times {{10}^{-5}}\] when partial pressure is measured in atmospheres. The corresponding value of \[{{K}_{c}}\] with concentration in mole litre-1, is [IIT Screening 2000; Pb. CET  2004]
  A)
                  \[1.44\times {{10}^{-5}}\]/\[{{\left( 0.082\times 500 \right)}^{-2}}\]         done clear
  B)
                  \[1.44\times {{10}^{-5}}\]/\[{{\left( 8.314\times 773 \right)}^{-2}}\] done clear
  C)
                  \[1.44\times {{10}^{-5}}\]/\[{{\left( 0.082\times 773 \right)}^{2}}\] done clear
  D)
                  \[1.44\times {{10}^{-5}}\]/\[{{\left( 0.082\times 773 \right)}^{-2}}\] done clear
  View Solution play_arrow

• question_answer37)
  A chemical reaction is catalyzed by a catalyst X. Hence X  [AIIMS 2000]
  A)
                  Reduces enthalpy of the reaction done clear
  B)
                  Decreases rate constant of the reaction done clear
  C)
                  Increases activation energy of the reaction done clear
  D)
                  Does not affect equilibrium constant of reaction done clear
  View Solution play_arrow

• question_answer38)
  At 490°C, the equilibrium constant for the synthesis of HI is 50, the value of K for the dissociation of HI will be [KCET 2000]
  A)
                  20.0        done clear
  B)
                  2.0 done clear
  C)
                  0.2          done clear
  D)
                  0.02 done clear
  View Solution play_arrow

• question_answer39)
  In which of the following case Kp is less than Kc [AFMC 1997; Pb. PMT 2000]
  A)
                  \[{{H}_{2}}+C{{l}_{2}}\]⇌\[2HCl\]        done clear
  B)
                  \[2S{{O}_{2}}+{{O}_{2}}\]⇌\[2S{{O}_{3}}\] done clear
  C)
                  \[{{N}_{2}}+{{O}_{2}}\]⇌\[2NO\]         done clear
  D)
                  \[PC{{l}_{5}}\]⇌\[PC{{l}_{3}}+C{{l}_{2}}\] done clear
  View Solution play_arrow

• question_answer40)
  \[CaC{{O}_{3(s)}}\]⇌\[Ca{{O}_{(s)}}+C{{O}_{2(g)}}\] which of the following expression is correct                                               [MH CET 2000]
  A)
                  \[{{K}_{P}}=({{P}_{CaO}}+{{P}_{C{{O}_{2}}}}/{{P}_{CaC{{O}_{3}}}})\] done clear
  B)
                  \[{{K}_{P}}={{P}_{C{{O}_{2}}}}\]                done clear
  C)
                  \[{{K}_{P}}\times ({{P}_{CaO}}\times {{P}_{C{{O}_{2}}}}).{{P}_{CaC{{O}_{3}}}}\] done clear
  D)
                  \[\frac{{{K}_{p}}[CaO][C{{O}_{2}}]}{[CaC{{O}_{3}}]}\] done clear
  View Solution play_arrow

• question_answer41)
  If \[{{K}_{c}}\] is the equilibrium constant for the formation of \[N{{H}_{3}}\], the dissociation constant of ammonia under the same temperature will be    [DPMT 2001]
  A)
   \[{{K}_{c}}\]      done clear
  B)
                  \[\sqrt{{{K}_{c}}}\] done clear
  C)
                  \[K_{c}^{2}\]      done clear
  D)
                  \[1/{{K}_{c}}\] done clear
  View Solution play_arrow

• question_answer42)
  3.2 moles of hydrogen iodide were heated in a scaled bulb at 444°C till the equilibrium was reached. The degree of dissociation of HI at this temperature was found to be 22%. The number of moles of hydrogen iodide present at equilibrium are [MH CET 2001]
  A)
                  1.87        done clear
  B)
                          2.496 done clear
  C)
                  4.00        done clear
  D)
                  2.00 done clear
  View Solution play_arrow

• question_answer43)
  The \[{{K}_{c}}\] for \[{{H}_{2(g)}}+{{I}_{2(g)}}\]⇌\[2H{{I}_{(g)}}\] is 64. If the volume of the container is reduced to one-half of its original volume, the value of the equilibrium constant will be  [JIPMER 2001]
  A)
                  + 28        done clear
  B)
                          64 done clear
  C)
                  32           done clear
  D)
                  16 done clear
  View Solution play_arrow

• question_answer44)
  A reversible reaction \[{{H}_{2}}+C{{l}_{2}}\]⇌\[2HCl\]is carries out in one litre flask. If the same reaction is carried out in two litre flask, the equilibrium constant will be            [JIPMER 2001]
  A)
                  Decreased          done clear
  B)
                          Doubled done clear
  C)
                  Halved done clear
  D)
                  Same done clear
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• question_answer45)
  For the reaction \[2N{{O}_{2(g)}}\]⇌\[2N{{O}_{(g)}}+{{O}_{2(g)}}\],\[{{K}_{c}}=1.8\times {{10}^{-6}}\] at 185°C. At 185°C the Kc for \[N{{O}_{(g)}}\]+ \[\frac{1}{2}{{O}_{2(g)}}\]⇌ \[N{{O}_{2(g)}}\] is [JIPMER 2001]
  A)
                  \[1.95\times {{10}^{-3}}\]             done clear
  B)
                          \[1.95\times {{10}^{3}}\] done clear
  C)
                  \[7.5\times {{10}^{2}}\] done clear
  D)
                  \[0.9\times {{10}^{6}}\] done clear
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• question_answer46)
  If for \[{{H}_{2}}_{(g)}+\frac{1}{2}{{S}_{2(S)}}\]⇌\[{{H}_{2}}{{S}_{(g)}}\] and \[{{H}_{2(g)}}+B{{r}_{2(g)}}\]⇌\[2HB{{r}_{(g)}}\] The equilibrium constants are K1 and K2 respectively, the reaction \[B{{r}_{2}}_{(g)}+{{H}_{2}}{{S}_{(g)}}\]⇌\[2HB{{r}_{(g)}}+\frac{1}{2}{{S}_{2(S)}}\] would have equilibrium constant                                              [MP PMT 2001]
  A)
                  \[{{K}_{1}}\ \times \ {{K}_{2}}\] done clear
  B)
                          \[{{K}_{1}}/{{K}_{2}}\] done clear
  C)
                  \[{{K}_{2}}/{{K}_{1}}\]   done clear
  D)
                  \[K_{2}^{2}/{{K}_{1}}\] done clear
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• question_answer47)
  Some solid \[N{{H}_{4}}HS\] is placed in a flask containing 0.5 atm of \[N{{H}_{3}}\], what would be pressures of \[N{{H}_{3}}\] and \[{{H}_{2}}S\] when equilibrium is reached \[N{{H}_{4}}H{{S}_{(g)}}\] ⇌ \[N{{H}_{3(g)}}+{{H}_{2}}{{S}_{(g)}}\], \[{{K}_{p}}=0.11\]            [UPSEAT 2001]
  A)
                  6.65 atm              done clear
  B)
                          0.665 atm done clear
  C)
                  0.0665 atm          done clear
  D)
                  66.5 atm done clear
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• question_answer48)
  In which of the following reactions, increase in the volume at constant temperature don?t affect the number of moles at equilibrium.                                                        [AIEEE 2002]
  A)
                  \[2N{{H}_{3}}\]⇌ \[{{N}_{2}}+3{{H}_{2}}\] done clear
  B)
                          \[{{C}_{(g)}}\]\[+\ \frac{1}{2}\] \[{{O}_{2(g)}}\]\[\to \]\[C{{O}_{(g)}}\]               done clear
  C)
                  \[{{H}_{2(g)}}\]+ \[{{O}_{2(g)}}\] \[\to \]\[{{H}_{2}}{{O}_{2(g)}}\] done clear
  D)
                  None of these done clear
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• question_answer49)
  A chemical reaction was carried out at 300 K and 280 K. The rate constants were found to be K1 and K2 respectively. The energy of activation is \[\text{1}\text{.157}\times \text{1}{{\text{0}}^{\text{4}}}\ cal\ mol{{e}^{-1}}\] and \[R=1.987\ cal\]. Then      [KCET 2002]
  A)
                  \[{{K}_{2}}\approx 0.25{{K}_{1}}\]            done clear
  B)
                          \[{{K}_{2}}\approx 0.5{{K}_{1}}\] done clear
  C)
                  \[{{K}_{2}}\approx 4{{K}_{1}}\]  done clear
  D)
                  \[{{K}_{2}}\approx 2{{K}_{1}}\] done clear
  View Solution play_arrow

• question_answer50)
  \[\Delta n\], the change in the number of moles for the reaction, \[{{C}_{12}}{{H}_{22}}{{O}_{11}}_{(s)}\]\[+12{{O}_{2(g)}}\] ⇌ \[12C{{O}_{2(g)}}\] \[+11{{H}_{2}}{{O}_{(l)}}\] at 25°C is                                              [Pb. PMT 2002]
  A)
                  0              done clear
  B)
                  2 done clear
  C)
                  4              done clear
  D)
                  ? 1 done clear
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• question_answer51)
  Value of \[{{K}_{p}}\]in the reaction \[MgC{{O}_{3(s)}}\]⇌\[Mg{{O}_{(s)}}\] \[+\,C{{O}_{2(g)}}\] is   [CBSE PMT 2000; RPMT 2002]
  A)
                  \[{{K}_{P}}={{P}_{CO}}_{2}\]      done clear
  B)
                          \[{{K}_{P}}=Pc{{o}_{2}}\times \frac{Pc{{o}_{2}}\times {{P}_{MgO}}}{{{P}_{MgC{{O}_{3}}}}}\] done clear
  C)
                  \[K{}_{P}=\frac{Pc{{o}_{2}}\times {{P}_{MgO}}}{{{P}_{MgC{{O}_{3}}}}}\] done clear
  D)
                   \[{{K}_{P}}=\frac{{{P}_{MgC{{O}_{3}}}}}{{{P}_{C{{O}_{2}}}}\times {{P}_{MgO}}}\] done clear
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• question_answer52)
  For \[{{N}_{2}}+3{{H}_{2}}\]⇌\[2N{{H}_{3}}\] equilibrium constant is k then equilibrium constant for 2N2 + 6H2 ⇌ 4NH3 is [RPMT 2002]
  A)
                  \[\sqrt{k}\]         done clear
  B)
                          \[{{k}^{2}}\] done clear
  C)
                  \[k/2\]  done clear
  D)
   \[\sqrt{k\ +\ 1}\] done clear
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• question_answer53)
  For the reaction, \[PC{{l}_{3(g)}}\]+\[C{{l}_{2(g)}}\]⇌\[PC{{l}_{5(g)}}\], the value of \[{{K}_{c}}\] at 250°C is 26. The value of \[{{K}_{p}}\] at this temperature will be [UPSEAT 1999, 2000, 02]
  A)
                  0.61        done clear
  B)
                          0.57 done clear
  C)
                  0.83        done clear
  D)
                  0.46 done clear
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• question_answer54)
  A tenfold increase in pressure on the reaction \[{{N}_{2(g)}}\]\[+3{{H}_{2(g)}}\]⇌\[2N{{H}_{3(g)}}\] at equilibrium, makes \[{{K}_{p}}\] [MP PET 2003]
  A)
                  Unchanged         done clear
  B)
                          Two times done clear
  C)
                  Four times          done clear
  D)
                  Ten times done clear
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• question_answer55)
  If equilibrium constant for reaction \[2AB\]⇌\[{{A}_{2}}+{{B}_{2}}\], is 49, then the equilibrium constant for reaction AB ⇌ \[\frac{1}{2}{{A}_{2}}+\frac{1}{2}{{B}_{2}}\], will be [EAMCET 1998; MP PMT 2003]
  A)
                  7              done clear
  B)
                          20 done clear
  C)
                  49           done clear
  D)
                  21 done clear
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• question_answer56)
  In the manufacture of ammonia by Haber's process,  \[{{N}_{2(g)}}+3{{H}_{2}}\] ⇌\[2N{{H}_{3(g)}}+92.3kJ\], which of the following conditions is unfavourable [KCET 2004]
  A)
                  Increasing the temperature done clear
  B)
                  Increasing the pressure done clear
  C)
                  Reducing the temperature done clear
  D)
                  Removing ammonia as it is formed done clear
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• question_answer57)
  The chemical equilibrium of a reversible reaction is not influenced by                                     [KCET 2004]
  A)
                  Pressure done clear
  B)
                  Catalyst done clear
  C)
                  Concentration of the reactants done clear
  D)
                  Temperature done clear
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• question_answer58)
  Of  the following which change will shift the reaction towards the product                 \[{{I}_{2}}(g)\]⇌\[2I(g),\ \Delta H_{r}^{0}(298K)=+150\ kJ\]  [AIIMS 2004]
  A)
                  Increase in concentration of l done clear
  B)
                  Decrease in concentration of \[{{I}_{2}}\] done clear
  C)
                  Increase in temperature done clear
  D)
                  Increase in total pressure done clear
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• question_answer59)
  For the reaction, \[C{{O}_{(g)}}+C{{l}_{2(g)}}\]⇌ \[COC{{l}_{2(g)}}\] the \[{{K}_{p}}/{{K}_{c}}\] is equal to                                            [AIEEE 2004]
  A)
                  \[\sqrt{RT}\]      done clear
  B)
                  \[RT\] done clear
  C)
                  \[1/RT\]               done clear
  D)
                  \[1.0\] done clear
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• question_answer60)
  Consider the following reversible reaction at equilibrium, \[2{{H}_{2}}{{O}_{(g)}}\] ⇌ \[2{{H}_{2(g)}}+{{O}_{2(g)}}\]; \[\Delta H=241.7\,kJ\] Which one of the following changes in conditions will lead to maximum decomposition of \[{{H}_{2}}{{O}_{(g)}}\]            [Kerala PMT 2004]
  A)
                  Increasing both temperature and pressure done clear
  B)
                  Decreasing temperature and increasing pressure done clear
  C)
                  Increasing temperature and decreasing pressure done clear
  D)
                  Increasing temperature at constant pressure  done clear
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• question_answer61)
  For reaction, \[2A(g)\]⇌ \[3C(g)+D(s)\], the value of \[{{K}_{c}}\]will be equal to                                      [Pb. CET 2003]
  A)
                  \[{{K}_{p}}(RT)\]              done clear
  B)
                  \[{{K}_{p}}/RT\] done clear
  C)
                  \[={{K}_{p}}\]    done clear
  D)
                  None of these done clear
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• question_answer62)
  In the reaction, \[{{A}_{2}}(g)+4{{B}_{2}}(g)\]⇌ \[2A{{B}_{4}}(g)\]           \[\Delta H<0\]the formation of \[A{{B}_{4}}\]is will be favoured at  [IIT Screening 1990; MP PET 2004]
  A)
                  Low temperature, high pressure done clear
  B)
                  High temperature, low pressure done clear
  C)
                  Low temperature, low pressure done clear
  D)
                  High temperature, high pressure done clear
  View Solution play_arrow

• question_answer63)
  The formation of \[S{{O}_{3}}\] takes place according to the following reaction, \[2S{{O}_{2}}+{{O}_{2}}\]⇌ \[2S{{O}_{3}}\]; \[\Delta H=-45.2\ kcal\]The formation of \[S{{O}_{3}}\] is favoured by               [UPSEAT 2004]
  A)
                  Increasing in temperature done clear
  B)
                  Removal of oxygen done clear
  C)
                  Increase of volume done clear
  D)
                  Increasing of pressure done clear
  View Solution play_arrow

• question_answer64)
  What is the effect of increasing pressure on the dissociation of \[PC{{l}_{5}}\] according to the equation                 \[PC{{l}_{5(g)}}\]⇌ \[PC{{l}_{3(g)}}+C{{l}_{2(g)}}-x\ cal\]                                 [UPSEAT 2004]
  A)
                  Dissociation decreases done clear
  B)
                  Dissociation increases done clear
  C)
                  Dissociation does not change done clear
  D)
                  None of these done clear
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• question_answer65)
  If equilibrium constants of reaction, \[{{N}_{2}}+{{O}_{2}}\]⇌ \[2NO\] is \[{{K}_{1}}\]and \[\]\[\frac{1}{2}{{N}_{2}}+\frac{1}{2}{{O}_{2}}\]⇌ \[NO\] is \[{{K}_{2}}\], then               [BHU 2004]
  A)
                  \[{{K}_{1}}={{K}_{2}}\]   done clear
  B)
                  \[{{K}_{2}}=\sqrt{{{K}_{1}}}\] done clear
  C)
                  \[{{K}_{1}}=2{{K}_{2}}\]                done clear
  D)
                  \[{{K}_{1}}=\frac{1}{2}{{K}_{2}}\] done clear
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• question_answer66)
  For the following reaction in gaseous phase\[CO+\frac{1}{2}{{O}_{2}}\to C{{O}_{2}}\]; \[{{K}_{p}}/{{K}_{c}}\] is                  [DCE 2002]
  A)
                  \[{{(RT)}^{1/2}}\]             done clear
  B)
                  \[{{(RT)}^{-1/2}}\] done clear
  C)
                  \[(RT)\]                done clear
  D)
                  \[{{(RT)}^{-1}}\] done clear
  View Solution play_arrow

• question_answer67)
  For the reaction \[{{N}_{2(g)}}+{{O}_{2(g)}}\] ⇌\[2N{{O}_{(g)}}\], the value of \[{{K}_{c}}\] at \[{{800}^{o}}C\] is 0.1. When the equilibrium concentrations of both the reactants is 0.5 mol, what is the value of \[{{K}_{p}}\] at the same temperature      [KCET 2005]
  A)
                  0.5          done clear
  B)
                  0.1 done clear
  C)
                  0.01        done clear
  D)
                  0.025 done clear
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• question_answer68)
  \[{{A}_{(g)}}+3{{B}_{(g)}}\] ⇌\[4{{C}_{(g)}}\]. Starting concentration of A is equal to B, equilibrium concentration of A and C are same. \[{{K}_{c}}=\] [Kerala CET 2005]
  A)
                  0.08        done clear
  B)
                  0.8 done clear
  C)
                  8              done clear
  D)
                  80 done clear
  E)
                  1/8 done clear
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• question_answer69)
  \[N{{H}_{4}}COON{{H}_{2(s)}}\] ⇌ \[2N{{H}_{3(g)}}+C{{O}_{2(g)}}\] if equilibrium pressure is 3 atm for the above reaction \[{{K}_{p}}\] for the reaction is                  [DPMT 2005]
  A)
                  4              done clear
  B)
                  27 done clear
  C)
                  4/27       done clear
  D)
                  1/27 done clear
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