### Related Questions

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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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4

# Compressibility factor for almost all the gases are approximately same at the same

A. Pressure and temperature

B. Reduced pressure and reduced temperature

C. Critical pressure and critical temperature

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4

# 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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4

# In case of a reversible process (following pv^{n} = constant), work obtained for trebling the volume (v1 = 1 m^{3} and v_{2}3 m^{3}) is maximum, when the value of 'n' is

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4

# Which is a state function?

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# Which of the following identities can be most easily used to verify steam table data for superheated steam?

A. (∂T/∂V)_{S} = (∂p/∂S)_{V}

B. (∂T/∂P)_{S} = (∂V/∂S)_{P}

C. (∂P/∂T)_{V} = (∂S/∂V)_{T}

D. (∂V/∂T)_{P} = -(∂S/∂P)_{T}

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# Entropy change in case of reversible adiabatic process is

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# For organic compounds, group contribution method can be used for the estimation of

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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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# The expression for entropy change given by, ΔS = - nR ln (P_{2}/P_{1}), holds good for

A. Expansion of a real gas

B. Reversible isothermal volume change

C. Heating of an ideal gas

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4

# For water at 300°C, it has a vapour pressure 8592.7 kPa and fugacity 6738.9 kPa Under these conditions, one mole of water in liquid phase has a volume of 25.28 cm3 and that in vapour phase in 391.1 cm3.Fugacity of water (in kPa) at 9000 kPa will be

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4

# 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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# Fundamental principle of refrigeration is based on the __________ law of thermodynamics.

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# Melting of ice is an example of an __________ process.

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# Internal energy is equal to the heat absorbed in case of a/an __________ process.

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# Internal energy of an element at 1 atm and 25° C is __________ kcal/kg.mole.

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# Chemical potential is a/an

C. Force which drives the chemical system to equilibrium

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# When a system is in equilibrium for all possible processes, the differential or finite change of entropy is

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4

# Out of the following refrigeration cycles, which one has maximum COP?

C. Ordinary vapor compression cycle

D. Vapor compression with a reversible expansion engine

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4

# For the reversible exothermic reaction, N_{2} + 3H_{2} 2NH_{3}, increase of pressure would

A. Shift the equilibrium towards right

B. Give higher yield of NH_{3}

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# The four properties of a system viz. P, V, T, S are related by __________ equation.

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# For an exothermic reaction

A. Only enthalpy change (ΔH) is negative

B. Only internal energy change (ΔE) is negative

C. Both ΔH and ΔE are negative

D. Enthalpy change is zero

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4

# The equation DU = Tds - PdV is applicable to infinitesimal changes occuring in

A. An open system of constant composition

B. A closed system of constant composition

C. An open system with changes in composition

D. A closed system with changes in composition

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# In case of an __________ process, the temperature of the system increases.

A. Isothermal compression

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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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4

# When a gas is expanded from high pressure region to low pressure region; temperature change occurs. This phenomenon is related to the

B. Gibbs-Helmholtz equation

C. Third law of thermodynamics

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# The equilibrium constant for a chemical reaction at two different temperatures is given by

A. Kp_{2}/Kp_{1} = - (ΔH/R) (1/T_{2} - 1/T_{1})

B. Kp_{2}/Kp_{1} = (ΔH/R) (1/T_{2} - 1/T_{1})

C. Kp_{2}/Kp_{1} = ΔH (1/T_{2} - 1/T_{1})

D. Kp_{2}/Kp_{1} = - (1/R) (1/T_{2} - 1/T_{1})

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# Enthalpy 'H' is defined as

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# The equation, C_{p} - C_{v} = R, is true for __________ gas.

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# Entropy change of mixing two liquid substances depends upon the

B. Quantity (i.e. number of moles)