Q.1
Co-efficient of Performance (COP) of a refrigerator is the ratio of the
Q.2
The value of Joule-Thomson co-efficient, in case where cooling occurs after the throttling process is
Q.3
The chemical potential of any constituent of an ideal solution depends on the __________ of the solution.
Q.4
After throttling, gas temperature
Q.5
Critical temperature is defined as the temperature above which a gas will
Q.6
In a homogeneous solution, the fugacity of a component depends upon the
Q.7
Solubility of a substance which dissolves with an increase in volume and liberation of heat will be favoured by the
Q.8
Normal temperature and pressure (N.T.P.) corresponds to
Q.9
For an incompressible fluid, the __________ is a function of both pressure as well as temperature.
Q.10
Pick out the wrong statement.
Q.11
Which of the following equations is obtained on combining 1st and 2nd law of thermodynamics, for a system of constant mass?
Q.12
For an exothremic reaction
Q.13
Fugacity is most helpful in
Q.14
All gases except __________ shows a cooling effect during throttling process at atmospheric temperature and pressure.
Q.15
For equilibrium process (i.e. reversible) in an isolated system
Q.16
For an ideal gas, the internal energy depends upon its __________ only.
Q.17
Equation which relates pressure, volume and temperature of a gas is called the
Q.18
Heat of formation of an element in its standard state is
Q.19
A chemical reaction will occur spontaneously at constant pressure and temperature, if the free energy is
Q.20
Third law of thermodynamics is helpful in
Q.21
Specific heat of a gas for a reversible adiabatic process is
Q.22
The necessary condition for phase equilibrium in a multiphase system of N components is that the
Q.23
It is desired to bring about a certain change in the state of a system by performing work on the system under adiabatic conditions.
Q.24
Enthalpy changes over a constant pressure path are always zero for __________ gas.
Q.25
Thermal efficiency of a Carnot engine can approach 100%, only when the temperature of the
Q.26
At normal boiling point, molar entropy of vaporisation is __________ Joule/K°.mole.
Q.27
Which of the following decreases with increase in pressure?
Q.28
At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero. This follows from the
Q.29
What is the number of degree of freedom for a system of two miscible non-reacting species in vapor-liquid equilibrium forming an azeotrope?
Q.30
In case of vapour compression refrigeration system, elevating the evaporator temperature (keeping the condenser temperature constant) results in
Q.31
Enthalpy 'H' is defined as
Q.32
Entropy is a/an
Q.33
Pick out the correct equation relating 'F' and 'A'.
Q.34
The free energy change for a chemical reaction is given by (where, K = equilibrium constant)
Q.35
Variation of equilibrium pressure with temperature for any two phases of a given substances is given by the __________ equation.
Q.36
For a single component two phase mixture, the number of independent variable properties are
Q.37
The reaction A (l) R(g) is allowed to reach equilibrium conditions in an autoclave. At equilibrium, there are two phases, one a pure liquid phase of A and the other a vapor phase of A, R and S. Initially A alone is present. The number of degrees of freedom are
Q.38
In polytropic process (PVn = constant), if n = 1; it means a/an __________ process.
Q.39
Mollier diagram is a plot of
Q.40
PVy = constant, holds good for an isentropic process, which is
Q.41
The internal energy of an ideal gas is a function of its __________ only.
Q.42
Gibbs free energy at constant pressure and temperature under equilibrium conditions is
Q.43
An isentropic process is carried out at constant
Q.44
What is the degree of freedom for two mis-cible (non-reacting) substances in vapor-liquid equilibrium forming an azeotrope?
Q.45
At __________ point, all the three phases (i.e.solid, liquid and gas) co-exist.
Q.46
Melting of ice is an example of an __________ process.
Q.47
Claude's liquefaction process employs the cooling of gases by
Q.48
A domestic refrigerator has a/an __________ cooled condenser.
Q.49
Mollier chart is a __________ plot.
Q.50
Free energy change at equilibrium is
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