The unity of Planck’s constant ‘h’ in the equation, E = hv is____________________?

Related Mcqs:

1. The equation, (d loge PA/d loge xA) = (d loge PA/d loge xB) applicable to a binary solution of components. A and B in equilibrium with their vapors at constant temperature and pressure is called the _____________ equation?

   A. Van Laar
   B. Margules
   C. Gibbs-Duhem
   D. Gibbs-Duhem-Margules

2. The equation relating E, P, V and T which is true for all substances under all conditions is given by (∂E/∂V)T = T(∂P/∂T)H – P. This equation is called the ___________________?

   A. Maxwell’s equation
   B. Thermodynamic equation of state
   C. Equation of state
   D. Redlich-Kwong equation of state

3. To obtain integrated form of Clausius-Clapeyron equation, ln (P2/P1) = (ΔHV/R) (1/T1 – 1/T2) from the exact Clapeyron equation, it is assumed that the____________________?

   A. Volume of the liquid phase is negligible compared to that of vapour phase
   B. Vapour phase behaves as an ideal gas
   C. Heat of vaporisation is independent of temperature
   D. All A , B. & C.

4. The value of (Cp – Cv) for a real gas obeying Vander Wall’s equation is____________________?

   A. R
   B. > R
   C. < R
   D. 0.5 R

5. 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

6. Gibbs-Duhem equation relates composition in liquid phase and the _____________ at constant temperature & pressure?

   A. Fugacity
   B. Partial pressure
   C. Activity co-efficient
   D. All (A), (B), and (C)

7. In the equation, PVn = Constant, if the value of n = 0, then it represents a reversible ______________ process?

   A. Isobaric
   B. Isothermal
   C. Isentropic
   D. Isometric

8. In the equation, PVn = constant, if the value of n = 1, then it represents a reversible _____________ process?

   A. Isothermal
   B. Isobaric
   C. Polytropic
   D. Adiabatic

9. In the equation PVn = constant, if the value of n = y = Cp/Cv, then it represents a reversible ______________ process?

   A. Isothermal
   B. Adiabatic
   C. Isentropic
   D. Polytropic

10. 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