Related Questions
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4
If two pure liquid constituents are mixed in any proportion to give an ideal solution, there is no change in
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For a given substance at a specified temperature, activity is __________ to fugacity.
B. Inversely proportional
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The equation relating E, P, V and T which is true for all substances under all conditions is given by (∂E/∂V)T = T(∂P/∂T)H - P. This equation is called the
B. Thermodynamic equation of state
D. Redlich-Kwong equation of state
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4
What is the value of ln y (where y = activity co-efficient) for ideal gases?
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A liquid under pressure greater than its vapour pressure for the temperature involved is called a __________ liquid.
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4
Entropy is a/an
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The enthalpy change when ammonia gas is dissolved in water is called the heat of
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For an irreversible process involving only pressure-volume work
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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
B. Statement of Van't Hoff Equation
C. Le-Chatelier's principle
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The temperature at the eutectic point of the system is the __________ temperature that can be attained in the system.
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A gas mixture of three components is brought in contact with a dispersion of an organic phase in water. The degree of freedom of the system is
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Cv is given by
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In a reversible process
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For a constant volume process __________ by the system is used only to increase the internal energy.
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Pick out the wrong statement.
A. Minimum number of degree of freedom of a system is zero
B. Degree of freedom of a system containing a gaseous mixture of helium, carbon dioxide and hydrogen is 4
C. For a two phase system in equilibrium made up of four non-reacting chemical species, the number of degrees of freedom is 4
D. Enthalpy and internal energy change is zero during phase change processes like melting, vaporisation and sublimation
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The gas law (PV = RT) is true for an __________ change.
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In an irreversible process
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With increase in temperature, the internal energy of a substance
D. May increase or decrease; depends on the substance
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Which of the following is not correct for a reversible adiabatic process?
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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
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As the entropy of the universe is increasing, day by day, the work producing capacity of a heat engine is
D. Data sufficient, can't be predicted
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It is desired to bring about a certain change in the state of a system by performing work on the system under adiabatic conditions.
A. The amount of work needed is path dependent
B. Work alone cannot bring out such a change of state
C. The amount of work needed is independent of path
D. More information is needed to conclude anything about the path dependence or otherwise of the work needed
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For the gaseous phase chemical reaction, C2H4(g) + H2O(g) ↔ C2H5OH(g), the equilibrium conversion does not depend on the
A. Steam to ethylene ratio
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The principle applied in liquefaction of gases is
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The entropy change in a reversible isothermal process, when an ideal gas expands to four times its initial volume is
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__________ functions are exemplified by heat and work.
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The expression for entropy change given by, ΔS = nR ln (V2/V1) + nCv ln (T2/T1) is valid for
A. Reversible isothermal volume change
B. Heating of a substance
C. Cooling of a substance
D. Simultaneous heating and expansion of an ideal gas
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Which of the following is Clausius-Clapeyron Equation for vaporisation of an ideal gas under the condition that the molar volume of liquid is negligible compared to that of the vapor?
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Pick out the wrong statement pertaining to the decomposition of PCl5 represented by, PCl5 PCl3 + Cl2.Degree of dissociation of PCl5 will
A. Decrease on addition of Cl2
B. Increase on addition of an inert gas at constant pressure
C. Decrease on increasing the pressure of the system
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At 60° C, vapour pressure of methanol and water are 84.562 kPa and 19.953 kPa respectively. An aqueous solution of methanol at 60° C exerts a pressure of 39.223 kPa; the liquid phase and vapour phase mole fractions of methanol are 0.1686 and 0.5714 respectively. Activity co-efficient of methanol is