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11th Standard English Medium Chemistry Subject Physical and Chemical Equilibrium Book Back 1 Mark Questions with Solution Part - II

11th Standard

    Reg.No. :
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Chemistry

Time : 00:30:00 Hrs
Total Marks : 5

    Part I

    5 x 1 = 5
  1. Which of the following is not a general characteristic of equilibrium involving physical process ___________

    (a)

    Equilibrium is possible only in a closed system at a given temperature

    (b)

    The opposing processes occur at the same rate and there is a dynamic but stable condition

    (c)

    All the physical processes stop at equilibrium

    (d)

    All measurable properties of the system remains constant

  2. For the formation of Two moles of SO3(g) from SO2 and O2, the equilibrium constant is K1. The equilibrium constant for the dissociation of one mole of SO3 into SO2 and O2 is __________

    (a)

    \(1/K_1\)

    (b)

    \(K_1^2\)

    (c)

    \(({1\over K_1})^{1/2}\)

    (d)

    \({K_1\over 2}\)

  3. [Co(H2O)6]2+ (aq) (pink) + 4Cl (aq) ⇌ [CoCl4]2– (aq) (blue) + 6 H2O (l)
    In the above reaction at equilibrium, the reaction mixture is blue in colour at room temperature. On cooling this mixture, it becomes pink in colour. On the basis of this information, which one of the following is true?

    (a)

    ΔH > 0 for the forward reaction

    (b)

    ΔH = 0 for the reverse reaction

    (c)

    ΔH < 0 for the forward reaction

    (d)

    Sign of the ΔH cannot be predicted based on this information

  4. The equilibrium constants of the following reactions are:

      N2 + 3H2 ⇌ 2NH3   :    K1 
      N2 + O2 ⇌ 2NO      :    K2
      H2 + ½O2 ⇌ H2O   :    K3

    The equilibrium constant (K) for the reaction ;
    \({ 2NH }_{ 3 }+5/2{ O }_{ 2 }\overset { K }{ \rightleftharpoons } 2NO+{ 3H }_{ 2 }{ O },\) will be

    (a)

    \(K_2^3{K_3\over K_1}\)

    (b)

    \(K_1{K_3^3\over K_2}\)

    (c)

    \(K_2{K_3^3\over K_1}\)

    (d)

    \(K_2{K_3\over K_1}\)

  5. A 20 litre container at 400 K contains CO2 (g) at pressure 0.4 atm and an excess of SrO (neglect the volume of solid SrO). The volume of the container is now decreased by moving the movable piston fitted in the container. The maximum volume of the container, when pressure of CO2 attains its maximum value will be: Given that: SrCO3 (S) ⇌ SrO (S) + CO2(g)
    KP = 1.6 atm

    (a)

    2 litre

    (b)

    5 litre

    (c)

    10 litre

    (d)

    4 litre

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