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11th Standard English Medium Chemistry Subject Physical and Chemical Equilibrium Book Back 3 Mark Questions with Solution Part - I

11th Standard

    Reg.No. :
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Chemistry

Time : 00:30:00 Hrs
Total Marks : 15

    Part I

    5 x 3 = 15
  1. The value of Kc for the reaction
    N2O2(g) \(\rightleftharpoons \) 2NO2(g)

  2. The equilibrium concentrations of NH3, N2 and H2 are 1.8 x 10-2 M, 1.2 x 10-2 M and 3 x 10-2 M respectively. Calculate the equilibrium constant for the formation of NH3 from N2 and H2. [Hint: M= mol lit-1]

  3. For the reaction,
    A2(g) + B2(g) ⇌ 2AB(g) ; ΔH is –ve.
    the following molecular scenes represent different reaction mixture (A – green, B – blue)

    i) Calculate the equilibrium constant KP and (KC).
    ii) For the reaction mixture represented by scene (x), (y) the reaction proceed in which directions?
    iii) What is the effect of increase in pressure for the mixture at equilibrium.

  4. For the reaction
    SrCO3 (s) ⇌ SrO (s) + CO2(g),
    the value of equilibrium constant KP = 2.2 x 10–4 at 1002 K. Calculate KC for the reaction.

  5. Oxidation of nitrogen monoxide was studied at 200o C with initial pressures of 1 atm NO and 1 atm of O2. At equilibrium partial pressure of oxygen is found to be 0.52 atm calculate KP value.

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