Practice Test: Question Set - 19
1. For water at 300°C, it has a vapor pressure 8592.7 kPa and fugacity 6738.9 kPa Under these conditions, one mole of water in liquid phase has a volume of 25.28 cm3 and that in vapor phase in 391.1 cm3.Fugacity of water (in kPa) at 9000 kPa will be
- (A) 6738.9
- (B) 6753.5
- (C) 7058.3
- (D) 9000
2. Gibbs-Helmholtz equation is
- (A) ∆F = ∆H + T [∂(∆F)/∂T]P
- (B) ΔF = ΔH - TΔT
- (C) d(E - TS) T, V <
0
- (D) dP/dT = ∆Hvap/T.∆Vvap
3. For an ideal gas, the internal energy depends upon its __________ only.
- (A) Molecular size
- (B) Temperature
- (C) Volume
- (D) Pressure
4. Pick out the correct statement:
- (A) In an isothermal system, irreversible work is more than reversible
work
- (B) Under reversible conditions, the adiabatic work
is less than isothermal work
- (C) Heat, work, enthalpy and entropy are all 'state functions'
- (D) Matter and energy cannot be exchanged with the surroundings in a
closed system
5. Pick out the extensive property out of the following.
- (A) Surface tension
- (B) Free energy
- (C) Specific heat
- (D) Refractive index
6. The equation, PV = nRT, is best obeyed by gases at
- (A) Low pressure & high temperature
- (B) High pressure & low temperature
- (C) Low pressure & low temperature
- (D) None of these
7. The temperature at the eutectic point of the system is the __________ temperature that can be attained in the system.
- (A) Lowest
- (B) Highest
- (C) Average
- (D) None of these
8. Heat of reaction at constant volume is identified with __________ change.
- (A) Enthalpy
- (B) Internal energy
- (C) Either (a) or (b)
- (D) Neither (a) nor (b)
9. Pick out the correct statement.
- (A) Compression ratio of an Otto engine is comparatively higher than a
diesel engine
- (B) Efficiency of an Otto engine is higher than that of a diesel engine
for the same compression ratio
- (C) Otto engine efficiency decreases with the rise in compression ratio,
due to decrease in work produced per quantity of heat
- (D) Diesel engine normally operates at lower
compression ratio than an Otto engine for an equal output of work
10. The equation DU = Tds - PdV is applicable to infinitesimal changes occurring in
- (A) An open system of constant composition
- (B) A closed system of constant composition
- (C) An open system with changes in composition
- (D) A closed system with changes in composition
11. 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
12. Which of the following is not an intensive property?
- (A) Molar heat capacity
- (B) Internal energy
- (C) Viscosity
- (D) None of these
13. Which of the following represents the Virial equation of state?
- (A) T = [RT/(V- b)]
- [a/√T. V(V + b)]
- (B) PV/RT = 1 + (B/V) + (C/V2) + ……
- (C) n1u2 + μ2μ1 =
0
- (D) None of these
14. Van Laar equation deals with the activity co-efficients in
- (A) Binary solutions
- (B) Ternary solutions
- (C) Azeotropic mixture only
- (D) None of these
15. Pick out the wrong statement:
- (A) The expansion of a gas in vacuum is an irreversible process
- (B) An isometric process is a constant pressure process
- (C) Entropy change for a reversible adiabatic process is zero
- (D) Free energy change for a spontaneous process is negative
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