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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