### Related Questions

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# A system is said to be isopiestic, if there is no __________ change.

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# Standard temperature and pressure (S.T.P.) is

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# C_{v} for an ideal gas

A. Does not depend upon temperature

B. Is independent of pressure only

C. Is independent of volume only

D. Is independent of both pressure and volume

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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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# Second law of thermodynamics is concerned with the

A. Amount of energy transferred

B. Direction of energy transfer

C. Irreversible processes only

D. Non-cyclic processes only

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# Adiabatic compression of a saturated water vapour makes it

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# Out of the following refrigeration cycles, which one has the minimum COP (Co-efficient of performance)?

C. Ordinary vapour compression cycle

D. Vapour compression with a reversible expansion engine

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

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# Gibbs-Helmholtz equation is

A. ΔF = ΔH + T [∂(ΔF)/∂T]P

D. dP/dT = ΔH_{vap}/T.ΔV_{vap}

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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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# Solubility of a substance which dissolves with an increase in volume and liberation of heat will be favoured by the

A. Low pressure and high temperature

B. Low pressure and low temperature

C. High pressure and low temperature

D. High pressure and high temperature

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# Which of the following is not an intensive property?

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# Enthalpy of a gas depends upon its

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# Compressibility factor-reduced pressure plot on reduced co-ordinates facilitates

A. Use of only one graph for all gases

B. Covering of wide range

D. More accurate plotting

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

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# In case of the decomposition of hydroiodic acid (2HI H_{2} + I_{2}), addition of H_{2} (at equilibrium condition) will

A. Increase the partial pressure of I_{2}

B. Decrease the partial pressure of HI

C. Diminish the degree of dissociation of HI

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# The equation, (d log_{e} PA/d log_{e} xA) = (d log_{e} PA/d log_{e} 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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# Gibbs free energy of mixing at constant pressure and temperature is always

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# The expression, nC_{v}(T_{2} - T_{1}), is for the __________ of an ideal gas.

A. Work done under adiabatic condition

B. Co-efficient of thermal expansion

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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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# For a constant volume process __________ by the system is used only to increase the internal energy.

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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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# Absorption/evolution of heat during conversion of a substance from one allotropic form to another is termed as the heat of

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# An ideal gas is taken around the cycle ABCA as shown in P-V diagram below: The work done by the gas during the cycle is equal to

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# Maximum work that could be secured by expanding the gas over a given pressure range is the __________ work.

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# At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero. This follows from the

A. Third law of thermodynamics

B. Second law of thermodynamics

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# The Joule-Thomson co-efficient is defined as (∂T/∂P)_{H}. Its value at the inversion point is

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# The thermodynamic law, PV^{y} = constant, is not applicable in case of

A. Ideal compression of air

B. Free expansion of an ideal gas

C. Adiabatic expansion of steam in a turbine

D. Adiabatic compression of a perfect gas