Related Questions
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4
Heat of formation of an element in its standard state is
D. A function of pressure
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Change of heat content when one mole of compound is burnt in oxygen at constant pressure is called the
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4
Dry ice is
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The equation, (d loge PA/d loge xA) = (d loge PA/d loge xB) applicable to a binary solution of components. A and B in equilibrium with their vapors at constant temperature and pressure is called the __________ equation.
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4
Heat is added at constant temperature in an ideal __________ cycle.
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The enthalpy change when ammonia gas is dissolved in water is called the heat of
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The value of Joule-Thomson co-efficient, in case where cooling occurs after the throttling process is
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4
Entropy change of mixing two liquid substances depends upon the
B. Quantity (i.e. number of moles)
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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
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In the equation, PVn = constant, if the value of n = ± ∞, then it represents a reversible __________ process.
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The internal energy of an ideal gas is a function of its __________ only.
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In a homogeneous solution, the fugacity of a component depends upon the
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The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called __________ temperature.
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When liquid and vapour phase of multi-component system are in equilibrium (at a given temperature and pressure), then chemical potential of each component is
A. Same in both the phases
B. Zero in both the phases
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What is the number of degrees of freedom for liquid water in equilibrium with a mixture of nitrogen and water vapor?
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A two stage compressor is used to compress an ideal gas. The gas is cooled to the initial temperature after each stage. The intermediate pressure for the minimum total work requirement should be equal to the __________ mean of P1 and P2. (where, P1 and P2 are initial and final pressures respectively)
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With increase in compression ratio, the efficiency of the otto engine
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The melting point of paraffin wax (which contracts on solidification) __________ with pressure rise.
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The freezing point of a liquid decreases when the pressure is increased, if the liquid __________ while freezing.
C. Does not change in volume
D. Either (A), (B) or (C)
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What is the degree of freedom for two miscible (non-reacting) substances in vapor-liquid equilibrium forming an azeotrope?
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4
Equilibrium constant of a reaction varies with the
A. Initial concentration of the reactant
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The Maxwell relation derived from the differential expression for the Helmholtz free energy (dA) is
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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 cannot be exchanged with the surroundings in a closed system
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Which is not constant for an ideal gas?
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Trouton's ratio is given by (where λb, = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, °K)
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Choose the condition that must be specified in order to liquify CO2 (triple point for CO2 is - 57°C and 5.2 atm).
A. Pressure must be kept below 5.2 atm
B. Temperature must be kept above - 57°C
C. Pressure must be kept below 5.2 atm. and temperature must be kept above 57°C
D. Pressure and temperature must be kept below 5.2 atm. and - 57°C respectively
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If the vapour pressure at two temperatures of a solid phase in equilibrium with its liquid phase are known, then the latent heat of fusion can be calculated by the
B. Clausius-Clapeyron Equation
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For equilibrium process (i.e. reversible) in an isolated system
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Isentropic process means a constant __________ process.
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Third law of thermodynamics is concerned with the
A. Value of absolute entropy
C. Direction of energy transfer