What is the ratio of adiabatic compressibility to isothermal compressibility?
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Which of the following non-flow reversible compression processes require maximum work?
A. Adiabatic process
B. Isothermal process
C. Isobaric process
D. All of the above
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What is the value of Joule-Thomson co-efficient for an ideal gas?
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Which of the following equations is used for the prediction of activity co-efficient from experiments?
A. Van Laar equation
B. Margules equation
C. Wilson's equation
D. All of the above
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The molar excess Gibbs free energy, G E , for a binary liquid mixture at T and P is given by, ( RT G E ) = Ax1 x2 , where A is a constant. The corresponding equation for ln y1 , where y1 is the activity co-efficient of component 1, is
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What is the value of ln y (where y = activity co-efficient) for ideal gases?
A. Zero
B. Unity
C. Infinity
D. Negative
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__________ calorimeter is normally used for measuring the dryness fraction of steam, when it is very low.
A. Bucket
B. Throttling
C. Separating
D. A combination of separating & throttling
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Entropy is a measure of the __________ of a system.
A. Disorder
B. Orderly behaviour
C. Temperature changes only
D. None of these
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Entropy, which is a measure of the disorder of a system is
A. Independent of pressure
B. Independent of temperature
C. Zero at absolute zero temperature for a perfect crystalline substance
D. All of the above
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Joule-Thomson Co-efficient at any point on the inversion curve is
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Translational kinetic energy of molecules of an ideal gas is proportional to (where, T = absolute temperature of the gas)
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If two pure liquid constituents are mixed in any proportion to give an ideal solution, there is no change in
A. Volume
B. Enthalpy
C. Both A & B
D. Neither A nor B
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Joule-Thomson co-efficient depends on the
A. Pressure
B. Temperature
C. Both A & B
D. Neither A nor B
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In Joule-Thomson porous plug experiment, the
A. Enthalpy does not remain constant
B. Entire apparatus is exposed to surroundings
C. Temperature remains constant
D. None of these
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In case of steady flow compression polytropic process (PVn = constant), the work done on air is the lowest, when
A. N = y = 1.4
B. N = 0
C. N = 1
D. N = 1.66
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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
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Pick out the correct statement:
A. In an isothermal system, irreversible work is more than reversible work
B. Under reversible conditions, the adiabatic work is less than isothermal work
C. Heat, work, enthalpy and entropy are all 'state functions'
D. Matter and energy can not be exchanged with the surroundings in a closed system
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For a spontaneous process, free energy
A. Is zero
B. Increases
C. Decreases whereas the entropy increases
D. And entropy both decrease
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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 of the above
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High __________ is an undesirable property for a good refrigerant.
A. Specific heat
B. Latent heat of vaporisation
C. Viscosity
D. Specific vapor volume
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