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Equilibrium Tes...

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  • Question 1
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    The number of hydronium ions in 1ml1 ml of an aqueous solution of pHpH 12.012.0 at 25C25^{\circ}C is

  • Question 2
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    pHpH of 0.01M(NH4)2SO4)0.01 M - (NH_{4})_{2}SO_{4}) and 0.02MNH4OH0.02 M - NH_{4}OH buffer (pKapK_{a} of NH4+=9.26NH_{4}^{+} = 9.26) is

  • Question 3
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    For the reaction : PCl5(g)PCl3(g)+Cl2(g) PCl_5(g) \leftrightharpoons PCl_3(g) + Cl_2(g) , if initial moles of PCl5 PCl_5 is 'x', a is the degree of dissociation and P is total pressure at equilibrium , then PPCl3.P1 P_{PCl_3 } . P^{-1} is equal to

  • Question 4
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    Kp K_p for the reaction : N2O4(g)NO2 N_2O_4(g) \leftrightharpoons NO_2 is 640 mm at 775 K. The percentage dissociation of N2O4 N_2O_4 at equilibrium pressure of 160 m is:

  • Question 5
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    pHpH of water is 7.07.0 at 25C25^{\circ}C. If water is heated to 70C70^{\circ}C, the

  • Question 6
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    Nitrogen dioxide, NO2NO_{2}, exists in equilibrium with dinitrogen tetroxide, N2O4N_{2}O_{4}.
    2NO2(g)N2O4(g) H=57kJ mol12NO_{2}(g)\rightleftharpoons N_{2}O_{4}(g)\ \triangle H = -57kJ\ mol^{-1}
    Which conditions give the greatest percentage of N2O4(g)N_{2}O_{4}(g) at equilibrium?

  • Question 7
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    For the reaction : XY2(g)XY(g)+Y(g) XY_2 (g) \leftrightharpoons XY(g) + Y (g) the reaction is started with initial pressure of XY2 XY_2 , 600600 mmHg. The total pressure for gases at equilibrium is 800 mmHg. Assuming volume and temperature of the system remains constant, the value of the Kp K_p is

  • Question 8
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    The reaction between sulfur dioxide and oxygen is reversible.
    2SO2+O22SO32SO_2+O_2\rightleftharpoons 2SO_3
    ΔH=196\Delta H^{\bigoplus}=-196 kJ mol1mol^{-1}
    Which conditions of pressure and temperature favour the reverse reaction?


    PressureTemperature
    Ahighhigh
    Bhighlow
    Clowhigh
    Dlowlow

  • Question 9
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    Saccharin (Ka=2×1012K_{a} = 2 \times 10^{-12}) is a weak acid represented by formula, HSacHSac. A 4×1044 \times 10^{-4} mole amount of saccharin is dissolved in 200ml200 ml water of pHpH, 3.03.0. Assuming no change in volume, the concentration of Sac1Sac^{-1} ions in the resulting solution at equilibrium is

  • Question 10
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    For the equilibrium PCl5PCl3+Cl2PCl_5 \rightleftharpoons PCl_3 + Cl_2, Kp=α2(1α)VK_p =\dfrac{\alpha^2}{(1 - \alpha) V}, temperature remaining constant,

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