Minimum number of phases that exists in a system is 1. Number of chemical species in a colloidal system is__________________?

Related Mcqs:

1. At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by (where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.) ?

   A. μ° + RT ln f
   B. μ°+ R ln f
   C. μ° + T ln f
   D. μ° + R/T ln f

2. Number of phases in a colloidal system is_____________________?

   A. 1
   B. 2
   C. 3
   D. 4

3. For a thermodynamic system containing ‘x’ chemical species, the maximum number of phases that can co-exist at equilibrium is_________________?

   A. x
   B. x + 1
   C. x + 2
   D. x + 3

4. For multi-component multiple phases to be in equilibrium at the same pressure and temperature, the _______________ of each component must be same in all phases?

   A. Chemical potential
   B. Fugacity
   C. Both A. and B
   D. Neither A. nor B

5. Number of degrees of freedom for a three phase system in equilibrium comprising of three non-reacting chemical species is__________________?

   A. 2
   B. 0
   C. 1
   D. 3

6. Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The ratio of chemical potential to free energy of a pure substance at constant temperature and pressure is________________?

   A. 0
   B. 1
   C. ∞
   D. None of these

7. The minimum number of phases that can exist in a system is________________?

   A. 0
   B. 1
   C. 2
   D. 3

8. When liquid and vapour phases of one component system are in equilibrium (at a given temperature and pressure), the molar free energy is__________________?

   A. More in vapour phase
   B. More in liquid phase
   C. Same in both the phases
   D. Replaced by chemical potential which is more in vapour phase

9. Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted water stream ?

   A. Sedimentation tank
   B. Circular clarifier
   C. Mechanical flocculation
   D. Chemical coagulation

10. Chemical engineering thermodynamics is concerned with the ____________ in/of chemical processes?

    A. Reaction mechanism
    B. Calculation of rates
    C. Energy transformation from one form to another
    D. None of these