The equation, (d loge PA/d loge xA) = (d loge PA/d loge xB) applicable to a binary solution of components. A and B in equilibrium with their vapors at constant temperature and pressure is called the _____________ equation?

Related Mcqs:

1. The relation connecting the fugacities of various components in a solution with one another and to composition at constant temperature and pressure is called the _____________ equation?

   A. Gibbs-Duhem
   B. Van Laar
   C. Gibbs-Helmholtz
   D. Margules

2. Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant ‘K’ is____________________?

   A. 10 atm-1
   B. 105 atm-1
   C. 10 (dimensionless)
   D. 105 (dimensionless)

3. For a stable phase at constant pressure and temperature, the fugacity of each component in a binary system _____________ as its mole fraction increases?

   A. Decreases
   B. Increases
   C. Remain same
   D. Decreases linearly

4. Fugacity of a component in an ideal gas mixture is equal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at constant pressure and temperature ____________ as its mole fraction increases?

   A. Decreases
   B. Decreases exponentially
   C. Increases
   D. Remain constant

5. Saturated solution of benzene in water is in equilibrium with a mixture of air and vapours of benzene and water at room temperature and pressure. Mole fraction of benzene in liquid is xB and the vapour pressures of benzene and water at these conditions are pv B and pv w respectively. The partial pressure of benzene in air-vapour mixture is_________________?

   A. PvB
   B. xB.PvB
   C. (Patm – Pvw)xB
   D. xB.Patm

6. Clausius-Clapeyron equation is applicable to _____________ equilibrium processes?

   A. Solid-vapor
   B. Solid-liquid
   C. Liquid-vapor
   D. All A, B. and C

7. “When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change.” This is called the_______________?

   A. Le-Chatelier principle
   B. Kopp’s rule
   C. Law of corresponding state
   D. Arrhenius hypothesis

8. Gibbs-Duhem equation relates composition in liquid phase and the _____________ at constant temperature & pressure?

   A. Fugacity
   B. Partial pressure
   C. Activity co-efficient
   D. All (A), (B), and (C)

9. The molar excess Gibbs free energy, gE, for a binary liquid mixture at T and P is given by, (gE/RT) = A . x1. x2, where A is a constant. The corresponding equation for ln y1, where y1 is the activity co-efficient of component 1, is__________________?

   A. A . x22
   B. Ax1
   C. Ax2
   D. Ax12

10. Variation of equilibrium pressure with temperature for any two phases of a given substances is given by the ____________ equation?

    A. Gibbs-Duhem
    B. Maxwell’s
    C. Clapeyron
    D. None of these