Which is a state function ?

Related Mcqs:

1. A system undergoes a change from a given initial state to a given final state either by an irreversible process or by a reversible process, then (where, Δ S1 and Δ SR are the entropy changes of the system for the irreversible and reversible processes respectively) ?

   A. Δ S1 is always Δ SR
   C. Δ S1 is always > Δ SR
   D. Δ S1 is always = Δ SR

2. The standard state of a gas (at a given temperature) is the state in which fugacity is equal to__________________?

   A. Unity
   B. Activity
   C. Both A. & B
   D. Neither A. nor B

3. A reasonably general expression for vapour-liquid phase equilibrium at low to moderate pressure is φi yi P = Yi xifi° where, Φ is a vapor fugacity component, Yi is the liquid activity coefficient and fi° is the fugacity of the pure component i. the Ki value (Yi = Ki xi) is therefore, in general a function of ______________________?

   A. Temperature only
   B. Temperature and pressure only
   C. Temperature, pressure and liquid composition xi only
   D. Temperature, pressure, liquid composition xi and vapour composition yi

4. For an incompressible fluid, the _______________ is a function of both pressure as well as temperature?

   A. Internal energy
   B. Enthalpy
   C. Entropy
   D. All (A), B. & (C)

5. The internal energy of an ideal gas is a function of its _____________ only?

   A. Molecular size
   B. Volume
   C. Pressure
   D. Temperature

6. The partial molar enthalpy of a component in an ideal binary gas mixture of composition Z, at a temperature T and pressure P, is a function only of________________?

   A. T
   B. T and P
   C. T, P and Z
   D. T and Z

7. Free energy change of mixing two liquid substances is a function of the__________________?

   A. Concentration of the constituents only
   B. Quantities of the constituents only
   C. Temperature only
   D. All A, B. and C

8. Which of the following is not the function of a volute casing provided in a centrifugal pump ?

   A. To reduce the head loss in discharge
   B. To increase the pump efficiency
   C. To collect liquid from the periphery of the impeller and to transmit it to the delivery pipe at
   constant velocity
   D. To increase the pump discharge rate

9. Heat of formation of an element in its standard state is___________________?

   A. 0
   B. 0
   D. A function of pressure

10. The heat capacities for the ideal gas state depend upon the_________________?

    A. Pressure
    B. Temperature
    C. Both A. & B.
    D. Neither A. nor B.