### Related Questions

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# The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called the __________ temperature.

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# In a turbine, the fluid expands almost

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# Generation of heat by friction is an example of a/an __________ change.

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# A domestic refrigerator has a/an __________ cooled condenser.

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# Heat pump

A. Accomplishes only space heating in winter

B. Accomplishes only space cooling in summer

C. Accomplishes both (A) and (B)

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# The expression for entropy change, ΔS = n C_{p} . ln (T_{2}/T_{1}), is valid for the __________ of a substance.

A. Simultaneous pressure & temperature change

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# The change in __________ is equal to the reversible work for compression in steady state flow process under isothermal condition.

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# All gases during throttling process at atmospheric temperature and pressure show a cooling effect except

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# Normal temperature and pressure (N.T.P.) corresponds to

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# The quantitative effect of temperature on chemical equilibrium is given by the

B. Le-Chatelier's principle

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# __________ increases with increase in pressure.

A. The melting point of wax

B. The boiling point of a liquid

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# Adiabatic compression of a saturated water vapour makes it

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# Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ____with the increase of reduced temperature.

D. Decreases logarithmically

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# Which of the following is a widely used refrigerant in vapour compression refrigeration system (using large centrifugal compressor)?

B. Liquid sulphur dioxide

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# Fugacity and pressure are numerically equal, when the gas is

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# The molar excess Gibbs free energy, g^{E}, for a binary liquid mixture at T and P is given by, (g^{E}/RT) = A . x_{1}. x_{2}, where A is a constant. The corresponding equation for ln y_{1}, where y_{1} is the activity co-efficient of component 1, is

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# A change in state involving a decrease in entropy can be spontaneous, only if

C. It takes place isothermally

D. It takes place at constant volume

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# Gibbs-Duhem equation relates composition in liquid phase and the __________ at constant temperature & pressure.

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# C_{p} - C_{v} = R is valid for __________ gases.

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# The partial molar enthalpy of a component in an ideal binary gas mixture of composition Z, at a temperature T and pressure P, is a function only of

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# COP of a refrigerator drawing 1 kW of power per ton of refrigeration is about

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# One ton of refrigeration is defined as the heat rate corresponding to melting of one ton of ice in one

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# In which of the following reaction equilibrium, the value of equilibrium constant K_{p} will be more than is K_{c}?

C. 2SO_{2} + O_{2} 2SO_{3}

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# Henry's law is closely obeyed by a gas, when its __________ is extremely high.

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# Linde gas liquefaction process employs cooling

B. By expansion in an engine

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# In a P-V diagram (for an ideal gas), an isothermal curve will coincide within adiabatic curve (through a point), when

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# The most important application of distribution law is in

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# Entropy change for an irreversible isolated system is

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# In reactions involving solids and liquids (where change in volume is negligible), the heat of reaction at constant pressure as compared to that at constant volume is

D. Unpredictable; depends on the particular reaction

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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)