Number of phases in a colloidal system is_____________________?

Related Mcqs:

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

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

2. 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

3. 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

4. Solid and liquid phases of a substance are in equilibrium at the____________________?

   A. Critical temperature
   B. Melting point
   C. Freezing point
   D. Both B. and C

5. 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

6. 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

7. 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

8. 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

9. The point at which all the three (solid, liquid and gas) phases co-exist, is known as the ____________ point?

   A. Freezing
   B. Triple
   C. Boiling
   D. Boyle

10. The temperature at which both liquid and gas phases are identical, is called the _____________ point?

    A. Critical
    B. Triple
    C. Freezing
    D. Boiling