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

Related Mcqs:

1. At ____________ point, all the three phases (i.e. solid, liquid and gas) co-exist ?

   A. Eutectic
   B. Triple
   C. Plait
   D. Critical

2. “The equilibrium value of the mole fraction of the gas dissolved in a liquid is directly proportional to the partial pressure of that gas above the liquid surface”. This statement pertaining to the solubility of gases in liquid is the ______________ law?

   A. Raoult’s
   B. Henry’s
   C. Amagat’s
   D. None of these

3. 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

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

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

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

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

7. 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

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 compressibility factor of a gas is given by (where, V1 = actual volume of the gas V2 = gas volume predicted by ideal gas law)____________________?

   A. V1/V2
   B. V2/V1
   C. V1 – V2
   D. V1.V2

10. Enthalpy change resulting, when unit mass of solid is wetted with sufficient liquid, so that further addition of liquid produces no additional thermal effect, is called the heat of________________?

    A. Mixing
    B. Adsorption
    C. Wetting
    D. Complete wetting