December 2, 2018

Chemical Equilibrium ONLINE MCQ TEST

This Quiz is a Simple test for +2 Science group students which contain Questions asked from  Chemical Equilibrium . Just participate in it and test your skill. 💗💗💗💗💗💗💗

Set- 1       Set -2      Set- 3       Set -4        Set- 5       Set -6         Set-7       Set -8       Set- 9       Set -10

Set -1

  1. 2H2O(g) +  2Cl2(g)  4HCl(g) +  5O2(g), the value of Kp and Kc , the value of Kp and Kc are related as
  2. Kp = Kc
    Kp > Kc
    Kp < Kc
    Kp = Kc = 0

  3. For a homogenous gaseous reaction at 600 K 4NH3(g) + 5O2(g)  4NO(g) + 6H2O(g) the
  4. (mol dm–3)–1
    mol dm–3
    (mol dm–3)4
    (mol dm–3)–2

  5. In an endothermic equilibrium reaction, if K1 and K2 are the equilibrium constants at T1 and T2
  6. K1 < K2
    K1> K2
    K1 = K2
    None

  7. Forward reaction takes place, when
  8. Q < Kc
    Q > Kc
    Q = Kc
    Kc = 1/Q

  9. H2(g) + I2(g)  2HI(g) The equilibrium constant Kc for this reaction is 16. Kp value is
  10. 1 / 16
    4
    64
    16

  11. If the equilibrium constant for the formation of a product is 25, the equilibrium constant for
  12. 25
    1 / 25
    5
    625

  13. If the equilibrium constants of the following reactions 2A  B is K1 and B  2A is K2, then
  14. K1 = 2K2
    K1 = 1 / K2
    K2 = (K1)2
    K1 = 1 / K22

  15. In a reaction 2O3   3O2 the value of Kc is
  16. [O3]3 / [O2]2
    [O2]2 / [O3]3
    [O2]3 / [O3]2
    [O3] / [O2]

  17. In the equilibrium N2 + 3H2  2NH3, the maximum yield of ammonia will be obtained with the pro
  18. low pressure and high temperature
    low pressure and low temperature
    high temperature and high pressure
    high pressure and low temperature

  19. In the Haber process the yield of ammonia is greater
  20. at high pressure
    at low pressure
    at high temperature
    in absence of catalyst

  21. In the reversible reaction 2HI(g)  H2(g) + I2(g), Kp  is
  22. greater than Kc
    less than Kc
    equal to Kc
    0 / zero

  23. In the synthesis of NH3 between N2 and H2 reaction the unit of Kc is
  24. lit2 mol–2
    atm–2
    lit atm–1
    atm– l

  25. State of a chemical equilibrium is
  26. dynamic
    stationary
    both (a) and (b)
    none of these

  27. The equilibrium constant for the reaction 2A  B is 25 mol1 dm3 at 900 K. What is the equilibrium constant for the reaction B  2A in dm3 mol at the same temperature?
  28. 25
    625
    0.04
    0.4

  29. The fraction of total moles of reactant dissociated is called
  30. dissociation equilibrium
    degree of association
    degree of dissociation
    dissociation constant

  31. The maximum yield of ammonia by Haber’s process is
  32. 78%
    97%
    37%
    89%

  33. The optimum temperature used in contact process for the manufacture of SO3 is
  34. 400°C to 450°C
    1800°C to 2700°C
    500°C to 550°C
    350°C to 450°C

  35. The rate constant of the forward and reverse reactions are 8 x 105 and 2 x 104 respectively.
  36. 0.04
    0.02
    0.2
    0.4

  37. The relationship between Kp and Kc for the equilibrium 2H2O(g) + 2Cl2(g)  4HCl(g) + O2(g)is
  38. Kp = Kc
    Kp = Kc(RT)2
    Kp = Kc(RT)1
    Kp = Kc(RT)–2

  39. Two moles of ammonia gas are introduced into a previously evacuated 1.0 dm3 vessel in which it partially dissociates at high temperature. At equilibrium 1.0 mole of ammonia remains. The equilibrium constant Kc for the dissociation is
  40. 27 / 16 (mole dm–3)2
    27 / 8 (mole dm–3)2
    27 / 4 (mole dm–3)2
    none of these

  41. When Δng in a homogenous gaseous equilibrium is positive, then / If Δng is positive
  42. Kp = Kc
    Kp > Kc
    Kc > Kp
    Kp = 2Kc

  43. Which of the following gaseous equilibria is favoured by increase in temperature?
  44. N2O4 ⇌ 2NO2; ΔH = + 59 kJ mol–1
    N2 + 3H2 ⇌ 2NH3; ΔH = – 22 kcalmol–1
    2SO2 + O2 ⇌ 2SO3; ΔH = – 47 k cal mol–1
    Both (b) and (c)

  45. Which one of the following has negative value for Δng?
  46. H2(g) + I2(g) ⇌ 2HI(g)
    PCl5(g) ⇌ PCl3(g) + Cl2(g)
    3H2(g) + N2(g) ⇌ 2NH3(g)
    2H2O(g) + 2Cl2(g) ⇌ 4HCl(g) + O2(g)

  47. In an equilibrium reaction, when Q < Kc then
  48. forward reaction is favoured
    reverse reaction is favoured
    both forward and reverse reaction are favoured
    none of these

  49. In which of the following gaseous reaction Kp < Kc?
  50. PCl5(g) ⇌ PCl3(g) + Cl2(g)
    H2(g) + I2(g) ⇌ 2HI(g)
    N2(g) + 3H2(g) ⇌ 2NH3(g)
    CO(g) + H2O(g) ⇌ CO2(g) + H2(g)

  51. In the formation of HI from H2 and I2, Kp = Kc  because
  52. Δng = 2
    Δng = 1
    Δng = 0
    Δng = –1

  53. Presence of moisture in contact process
  54. activates the catalyst
    deactivates the catalyst
    increases the product
    makes the catalyst porous

  55. The maximum yield of SO3 in contact process is
  56. 97%
    37%
    50%
    47%

  57. The mole ratio of SO2 and O2 in contact process is
  58. 1 : 2
    2 : 1
    3 : 1
    1 : 3

  59. For the Equilibrium PCl5(g) ⇌ PCl3(g) + Cl2(g) the factor that favours the reverse reaction is
  60. Increase in concentration of PCl5
    Increase in concentration of Cl2
    No change in concentration of Cl2
    Decrease in concentration of Cl2

  61. The pressure required to get maximum yield of Ammonia by Haber's process
  62. 300 - 500 atm
    500 - 700 atm
    700 - 1200 atm 
    100 - 300 atm
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