The equation, PV = nRT, is best obeyed by gases at____________________?

Related Mcqs:

1. The expression, nRT ln(P1/P2), is for the _____________of an ideal gas?

   A. Compressibility
   B. Work done under adiabatic condition
   C. Work done under isothermal condition
   D. Co-efficient of thermal expansion

2. The expression, ΔG = nRT. ln(P2/P1), gives the free energy change______________?

   A. With pressure changes at constant temperature
   B. Under reversible isothermal volume change
   C. During heating of an ideal gas
   D. During cooling of an ideal gas

3. Ideal gas law is applicable at____________________?

   A. Low T, low P
   B. High T, high P
   C. Low T, high P
   D. High T, low P

4. Henry’s law is closely obeyed by a gas, when its _____________ is extremely high?

   A. Pressure
   B. Solubility
   C. Temperature
   D. None of these

5. 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

6. 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

7. 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.

8. If two gases have same reduced temperature and reduced pressure, then they will have the same____________________?

   A. Volume
   B. Mass
   C. Critical temperature
   D. None of these

9. The value of Cp & Cv respectively for monatomic gases in Kcal/kg Mole.°K are________________?

   A. 5 & 3
   B. 3.987 & 1.987
   C. 1.987 & 0.66
   D. 0.66 & 1.987

10. Gases are cooled in Joule-Thomson expansion, when it is _____________ inversion temperature?

    A. Below
    B. At
    C. Above
    D. Either B. or C.