With increase in reduced temperature, the fugacity co-efficient of a gas at constant reduced pressure
A. Increases
B. Decreases
C. Remains same
D. Decreases linearly
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In an isothermal process on an ideal gas, the pressure increases by 0.5 percent. The volume decreases by about __________ percent.
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The temperature at which both liquid and gas phases are identical, is called the __________ point.
A. Critical
B. Triple
C. Freezing
D. Boiling
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The variation of heat of reaction with temperature at constant pressure is given by the __________ law.
A. Kelvin's
B. Antonie's
C. Kirchoffs
D. None of these
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For a stable phase at constant pressure and temperature, the fugacity of each component in a binary system __________ as its mole fraction increases.
A. Decreases
B. Increases
C. Remains same
D. Decreases linearly
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Fugacity of a component in an ideal gas mixture is euqal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at contant pressure and temperature __________ as its mole fraction increases.
A. Decreases
B. Decreases exponentially
C. Increases
D. Remains constant
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When a gas is expanded from high pressure region to low pressure region; temperature change occurs. This phenomenon is related to the
A. Gibbs-Duhem equation
B. Gibbs-Helmholtz equation
C. Third law of thermodynamics
D. Joule-Thomson effect
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Fugacity co-efficient of a substance is the ratio of its fugacity to
A. Mole fraction
B. Activity
C. Pressure
D. Activity co-efficient
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Out of the following refrigeration cycles, which one has maximum COP?
A. Air cycle
B. Carnot cycle
C. Ordinary vapor compression cycle
D. Vapor compression with a reversible expansion engine
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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
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While dissolving a gas into a liquid at a constant temperature, the ratio of the concentration of the gas in the solution phase and in the gaseous phase is
A. Infinity
B. Unity
C. Constant
D. Negative
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Pick out the wrong statement.
A. The conversion for a gas phase reaction increases with decrease in pressure, if there is an increase in volume accompanying the reaction
B. With increase in temperature, the equilibrium constant increases for an exothermic reaction
C. The equilibrium constant of a reaction depends upon temperature only
D. The conversion for a gas phase reaction increases with increase in pressure, if there is a decrease in volume accompanying the reaction
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Internal energy is equal to the heat absorbed in case of a/an __________ process.
A. Constant volume
B. Polytropic
C. Adiabatic
D. Constant pressure
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__________ increases with increase in pressure.
A. The melting point of wax
B. The boiling point of a liquid
C. Both A and B
D. Neither A nor B
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A Carnot cycle consists of the following steps :
A. Two isothermals and two isentropics
B. Two isobarics and two isothermals
C. Two isochorics and two isobarics
D. Two isothermals and two isochorics
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Throttling process is a/an __________ process.
A. Reversible and isothermal
B. Irreversible and constant enthalpy
C. Reversible and constant entropy
D. Reversible and constant enthalpy
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The change in __________ is equal to the reversible work for compression in steady state flow process under isothermal condition.
A. Internal energy
B. Enthalpy
C. Gibbs free energy
D. Helmholtz free energy
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As the time is passing, entropy of the universe
A. Is increasing
B. Is decreasing
C. Remains constant
D. Data insufficient, can't be predicted
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The effect of changing the evaporator temperature on COP as compared to that of changing the condenser temperature (in vapour compression refrigeration system) is
A. Less pronounced
B. More pronounced
C. Equal
D. Data insufficient, can't be predicted
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"The fugacity of a gas in a mixture is equal to the product of its mole fraction and its fugacity in the pure state at the total pressure of the mixture". This is
A. The statement as per Gibbs-Helmholtz
B. Called Lewis-Randall rule
C. Henry's law
D. None of these
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