Maxwell’s relation corresponding to the identity, dH = dS = Vdp + Σμi dni is_____________________?

Related Mcqs:

1. 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

2. “Law of corresponding states” says that___________________?

   A. Two different gases behave similarly, if their reduced properties (i.e. P, V and T) are same
   B. The surface of separation (i. e. the meniscus) between liquid and vapour phase disappears at
   the critical temperature
   C. No gas can be liquefied above the critical temperature, howsoever high the pressure may be.
   D. The molar heat of energy of gas at constant volume should be nearly constant (about 3
   calories)

3. One ton of refrigeration is defined as the heat rate corresponding to melting of one ton of ice in one ________________?

   A. Hour
   B. Day
   C. Minute
   D. Second

4. 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

5. The Maxwell relation derived from the differential expression for the Helmholtz free energy (dA) is________________?

   A. (∂T/∂V)S = – (∂P/∂S)V
   B. (∂S/∂P)T = – (∂V/∂T)P
   C. (∂V/∂S)P = (∂T/∂P)S
   D. (∂S/∂V)T = (∂P/∂T)V

6. Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is_____________________?

   A. Positive
   B. Negative
   C. Zero
   D. Infinity

7. Compound having large heat of formation is_____________________?

   A. More stable
   B. Less stable
   C. Not at all stable (like nascent O2)
   D. Either more or less stable; depends on the compound

8. Number of phases in a colloidal system is_____________________?

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

9. The principle applied in liquefaction of gases is_____________________?

   A. Adiabatic expansion
   B. Joule-Thomson effect
   C. Both A. and B
   D. Neither A. nor B

10. Joule-Thomson co-efficient for a perfect gas is_____________________?

    A. Zero
    B. Positive
    C. Negative
    D. None of these