Chemical Thermodynamics Questions and Answers - Set 34 - ObjectiveBooks

Chemical Thermodynamics Questions and Answers - Set 34

Practice Test: Question Set - 34

1. Any substance above its critical temperature exists as
    (A) Saturated vapor
    (B) Solid
    (C) Gas
    (D) Liquid

2. Joule-Thomson co-efficient for a perfect gas is
    (A) Zero
    (B) Positive
    (C) Negative
    (D) None of these

3. The number of degrees of freedom for a mixture of ice and water (liquid) are
    (A) 3
    (B) 2
    (C) 1
    (D) 0

4. Grams of butane (C4H10) formed by the liquefaction of 448 liters of the gas (measured at (STP) would be
    (A) 580
    (B) 640
    (C) 1160
    (D) Data insufficient; can't be computed

5. Which is not constant for an ideal gas?
    (A) (∂P/∂V)T
    (B) (∂V/∂T)P
    (C) (∂P/∂V)V
    (D) All (a), (b) & (c)

6. In the ammonia synthesis reaction, N2 + 3H2  2NH3 + 22.4 kcal, the formation of NH3 will be favored by
    (A) High temperature
    (B) Low pressure
    (C) Low temperature only
    (D) Both low temperature and high pressure

7. Refrigeration capacity of a household refrigerator may be round about __________ tons.
    (A) 0.15
    (B) 1.5
    (C) 4.5
    (D) 6.5

8. What is the number of degree of freedom for a system of two miscible non-reacting species in vapor-liquid equilibrium forming an azeotrope?
    (A) 0
    (B) 2
    (C) 1
    (D) 3

9. Boiling of liquid is accompanied with increase in the
    (A) Vapor pressure
    (B) Specific Gibbs free energy
    (C) Specific entropy
    (D) All (a), (b) and (c)

10. What is the value of ln y (where y = activity co-efficient) for ideal gases?
    (A) Zero
    (B) Unity
    (C) Infinity
    (D) Negative

11. Near their critical temperatures, all gases occupy volumes __________ that of the ideal gas.
    (A) Less than
    (B) Same as
    (C) More than
    (D) Half

12. Change of heat content when one mole of compound is burnt in oxygen at constant pressure is called the
    (A) Calorific value
    (B) Heat of reaction
    (C) Heat of combustion
    (D) Heat of formation

13. Which of the following decreases with increase in pressure?
    (A) Melting point of ice
    (B) Melting point of wax
    (C) Boiling point of liquids
    (D) None of these

14. For a single component two phase mixture, the number of independent variable properties are
    (A) Two
    (B) One
    (C) Zero
    (D) Three

15. The internal energy of an ideal gas does not change in a reversible __________ process.
    (A) Isothermal
    (B) Adiabatic
    (C) Isobaric
    (D) Isometric

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