### Related Questions

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4

# Specific volume of an ideal gas is

B. The reciprocal of its density

C. Proportional to pressure

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# Compound having large heat of formation is

C. Not at all stable (like nascent O2)

D. Either more or less stable; depends on the compound

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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 the equation, PVn = constant, if the value of n = ± ∞, then it represents a reversible __________ process.

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# If atmospheric temperature and dew point are nearly equal, then the relative humidity is

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# Dry ice is

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# For an ideal gas, the activity co-efficient is

A. Directly proportional to pressure

B. Inversely proportional to pressure

C. Unity at all pressures

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# Dryness fraction of wet steam is defined as the ratio of mass of vapour in the mixture to the mass of mixture __________ calorimeter is not used for measuring the dryness fraction of steam.

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# In vapour compression refrigeration system, if the evaporator temperature and the condenser temperatures are -13°C and 37°C respectively, the Carnot COP will be

D. Data insufficient, can't be found out

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# Efficiency of a Carnot engine working between temperatures T_{1} and T_{2} (T_{1} < T) is

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# Joule-Thomson co-efficient which is defined as, η = (∂T/∂P)H = 1/Cp (∂H/∂T)P, changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is

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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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# Joule-Thomson co-efficient for a perfect gas is

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# __________ Equation predicts the activity coefficient from experimental data.

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# The standard Gibbs free energy change of a reaction depends on the equilibrium

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# The energy of activation of exothermic reaction is

C. Very large compared to that for endothermic reaction

D. Not possible to predict

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# Boyle's law for gases states that

A. P ∝ 1/V, when temperature is constant

B. P ∝ 1/V, when temperature & mass of the gas remain constant

C. P ∝ V, at constant temperature & mass of the gas

D. P/V = constant, for any gas

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# In the equation PV^{n} = constant, if the value of n = y = C_{p}/C_{v}, then it represents a reversible __________ process.

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# The internal energy of an ideal gas does not change in a reversible __________ process.

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# Which of the following non-flow reversible compression processes require maximum work?

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# (1/V) (∂V/∂T)_{P} is the mathematical expression

A. Joule-Thomson co-efficient

B. Specific heat at constant pressure (C_{p})

C. co-efficient of thermal expansion

D. Specific heat at constant volume (C_{V})

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# Choose the condition that must be specified in order to liquify CO_{2} (triple point for CO_{2} 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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# In the decomposition of PCl_{5} represented by, PCl_{5} PCl_{3} + Cl_{2}, decrease in the pressure of the system will __________ the degree of dissociation of PCl5.

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# Heating of water under atmospheric pressure is an __________ process.

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# Ideal refrigeration cycle is

B. Same as reverse Carnot cycle

C. Dependent on the refrigerant's properties

D. The least efficient of all refrigeration processes

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# If heat contents of CH_{4}, C_{2}H_{4} and C_{3}H_{8} are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH_{4}(g) + C_{2}H_{4}(g) C_{3}H_{8}(g) will be __________ Kcal.

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# __________ explains the equilibrium constant for any chemical reaction.

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# The gas law (PV = RT) is true for an __________ change.

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# (∂E/∂T)_{V} is the mathematical expression for

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