Chemical Engineering Thermodynamics Competitive Exam Questions - Set 03 - ObjectiveBooks

# Practice Test: Question Set - 03

1. The internal energy of an ideal gas is a function of its __________ only.
(A) Molecular size
(B) Volume
(C) Pressure
(D) Temperature

2. One mole of nitrogen at 8 bar and 600 K is contained in a piston-cylinder arrangement. It is brought to 1 bar isothermally against a resisting pressure of 1 bar. The work done (in Joules) by the gas is
(A) 30554
(B) 10373
(C) 4988.4
(D) 4364.9

3. Third law of thermodynamics is helpful in
(A) Prediction of the extent of a chemical reaction
(B) Calculating absolute entropies of substances at different temperature
(C) Evaluating entropy changes of chemical reaction
(D) Both (b) and (c)

4. Trouton's ratio of __________ liquids is calculated using Kistyakowsky equation.
(A) Polar
(B) Non-polar
(C) Both (a) & (b)
(D) Neither (a) nor (b)

5. Entropy change for an irreversible process taking system and surrounding together is
(A) 0
(B) > 0
(C) < 0
(D) None of these

6. The shape of T-S diagram for Carnot Cycle is a
(A) Rectangle
(B) Rhombus
(C) Trapezoid
(D) Circle

7. __________ explains the equilibrium constant for any chemical reaction.
(A) Henry's law
(B) Law of mass action
(C) Hess's law
(D) None of these

8. Claude's liquefaction process employs the cooling of gases by
(A) Expansion in an engine
(B) Following a constant pressure cycle
(C) Throttling
(D) None of these

9. "When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change." This is called the
(A) Le-Chatelier principle
(B) Kopp's rule
(C) Law of corresponding state
(D) Arrhenius hypothesis

10. The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances". This is the
(A) Lewis-Randall rule
(B) Statement of Van't Hoff Equation
(C) Le-Chatelier's principle
(D) None of these

11. The adiabatic throttling process of a perfect gas is one of constant enthalpy
(A) In which there is a temperature drop
(B) Which is exemplified by a non-steady flow expansion
(C) Which can be performed in a pipe with a constriction
(D) In which there is an increase in temperature

12. A Carnot cycle consists of the following steps:
(A) Two isothermal and two isentropic
(B) Two isobaric and two isothermal
(C) Two isochoric and two isobaric
(D) Two isothermals and two isochoric

13. An isolated system can exchange __________ with its surroundings.
(A) Matter
(B) Energy
(C) Neither matter nor energy
(D) Both matter and energy

14. A solid is transformed into vapor without going to the liquid phase at
(A) Triple point
(B) Boiling point
(C) Below triple point
(D) Always

15. The compressibility factor for an ideal gas is 1. Its value for any other real gas is
(A) 1
(B) < 1
(C) > 1
(D) Either (b) or (c), depends on the nature of the gas

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