Chemical Engineering Thermodynamics Question Paper - Set 26 - ObjectiveBooks

Chemical Engineering Thermodynamics Question Paper - Set 26

Practice Test: Question Set - 26

1. For a multi-component system, the term chemical potential is equivalent to the
    (A) Molal concentration difference
    (B) Molar free energy
    (C) Partial molar free energy
    (D) Molar free energy change

2. The efficiency of an Otto engine compared to that of a diesel engine, for the same compression ratio will be
    (A) More
    (B) Less
    (C) Same
    (D) Data insufficient to predict

3. Which of the following behaves most closely like an ideal gas?
    (A) He
    (B) N2
    (C) O2
    (D) H2

4. Boyle's law for gases states that
    (A) P 1/V, when temperature is constant
    (B) P 1/V, when temperature & mass of the gas remain constant
    (C) P V, at constant temperature & mass of the gas
    (D) P/V = constant, for any gas

5. The total change in the enthalpy of a system is independent of the
    (A) Number of intermediate chemical reactions involved
    (B) Pressure and temperature
    (C) State of combination and aggregation in the beginning and at the end of the reaction
    (D) None of these

6. Those solutions in which there is no volume change upon mixing the components in the liquid state and which, when diluted do not undergo any heat change (i.e. heat of dilution is zero), are called __________ solutions.
    (A) Ideal
    (B) Real
    (C) Isotonic
    (D) None of these

7. With increase in temperature, the atomic heat capacities of all solid elements
    (A) Increases
    (B) Decreases
    (C) Remains unchanged
    (D) Decreases linearly

8. A system in which there is exchange of energy but not of mass, is called a/an __________ system.
    (A) Isolated
    (B) Open
    (C) Insulated
    (D) Closed

9. Out of the following refrigeration cycles, which one has the minimum COP (Co-efficient of performance)?
    (A) Air cycle
    (B) Carnot cycle
    (C) Ordinary vapor compression cycle
    (D) Vapor compression with a reversible expansion engine

10. In a reversible process
    (A) Tds = dE + dW
    (B) dE - dW = Tds
    (C) dW - dE = Tds
    (D) Tds - dW + dE >0

11. For an irreversible process involving only pressure-volume work
    (A) (dF)Tp < 0
    (B) (dF)Tp = 0
    (C) (dF)Tp > 0
    (D) (dA)Tv > 0

12. Isotherm on an enthalpy-concentration diagram, for an ideal solution will be a
    (A) Straight line
    (B) Sine curve
    (C) Parabola
    (D) Hyperbola

13. Degrees of freedom at triple point will be
    (A) 0
    (B) 1
    (C) 2
    (D) 3

14. Number of phases in a colloidal system is:
    (A) 1
    (B) 2
    (C) 3
    (D) 4

15. Free energy
    (A) Decreases in all spontaneous (or irreversible) processes
    (B) Change during a spontaneous process has a negative value
    (C) Remains unchanged in reversible processes carried at constant temperature and pressure
    (D) All (a), (b) and (c)

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