Chemical Engineering Thermodynamics pdf Download for MCQ Test - Set 20 - ObjectiveBooks
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Chemical Engineering Thermodynamics pdf Download for MCQ Test - Set 20

Practice Test: Question Set - 20


1. The extensive properties are
    (A) Volume, mass and number of moles
    (B) Free energy, entropy and enthalpy
    (C) Both (a) and (b)
    (D) None of these

2. For organic compounds, group contribution method can be used for the estimation of
    (A) Critical properties
    (B) Specific gravity
    (C) Specific volume
    (D) Thermal conductivity

3. In an ideal gas mixture, fugacity of a species is equal to its
    (A) Vapor pressure
    (B) Partial pressure
    (C) Chemical potential
    (D) None of these

4. __________ increases with increase in pressure.
    (A) The melting point of wax
    (B) The boiling point of a liquid
    (C) Both (a) and (b)
    (D) Neither (a) nor (b)

5. A large iceberg melts at the base, but not at the top, because of the reason that
    (A) Ice at the base contains impurities which lowers its melting point
    (B) Due to the high pressure at the base, its melting point reduces
    (C) The iceberg remains in a warmer condition at the base
    (D) All (a), (b) and (c)

6. The enthalpy change when ammonia gas is dissolved in water is called the heat of
    (A) Solution
    (B) Formation
    (C) Dilution
    (D) Combustion

7. At normal boiling point, molar entropy of vaporization is __________ Joule/K°.mole.
    (A) 72
    (B) 92
    (C) 142
    (D) 192

8. Trouton's ratio is given by (where λb, = molal heat of vaporization of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, °K)
    (A) λb/Tb
    (B) Tbb
    (C) √(λb/Tb)
    (D) √(Tbb)

9. The theoretical minimum work required to separate one mole of a liquid mixture at 1 atm, containing 50 mole % each of n- heptane and n- octane into pure compounds each at 1 atm is
    (A) -2 RT ln 0.5
    (B) -RT ln 0.5
    (C) 0.5 RT
    (D) 2 RT

10. Joule-Thomson co-efficient depends on the
    (A) Pressure
    (B) Temperature
    (C) Both (a) & (b)
    (D) Neither (a) nor (b)

11. __________ Equation predicts the activity co-efficient from experimental data.
    (A) Lewis-Randall
    (B) Margules
    (C) Van Laar
    (D) Both (b) & (c)

12. Which of the following processes cannot be made reversible even under ideal condition of operation?
    (A) Free expansion of a gas
    (B) Compression of air in a compressor
    (C) Expansion of steam in a turbine
    (D) All (a), (b) & (c)

13. Charles' law for gases states that
    (A) V/T = Constant
    (B) V 1/T
    (C) V 1/P
    (D) PV/T = Constant

14. "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 vapor 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)

15. At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by (where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.)
    (A) μ° + RT ln f
    (B) μ°+ R ln f
    (C) μ° + T ln f
    (D) μ° + R/T ln f

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