Q.1
Which of the following is a widely used refrigerant in vapour compression refrigeration system (using large centrifugal compressor)?
Q.2
Keeping the pressure constant, to double the volume of a given mass of an ideal gas at 27°C, the temperature should be raised to __________ °C.
Q.3
Filling of gas from a high pressure cylinder into small bottles is an example of a/an __________ process.
Q.4
With increase in temperature, the internal energy of a substance
Q.5
y = specific heat ratio of an ideal gas is equal to
Q.6
Critical compressibility factor for all substances
Q.7
One ton of refrigeration is defined as the heat rate corresponding to melting of one ton of ice in one
Q.8
The unit of fugacity is the same as that of the
Q.9
Claussius-Clayperon equation gives accurate result, when the
Q.10
Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is
Q.11
Pick out the wrong statement.
Q.12
For an isothermal reversible compression of an ideal gas
Q.13
Boyle's law for gases states that
Q.14
Which of the following is not an intensive property?
Q.15
The standard Gibbs free energy change of a reaction depends on the equilibrium
Q.16
In the ammonia synthesis reaction, N₂ + 3H₂ ⇋ 2NH₃ + 22.4 kcal, the formation of NH₃ will be favoured by
Q.17
Joule-Thomson experiment is
Q.18
If the internal energy of an ideal gas decreases by the same amount as the work done by the system, then the
Q.19
Vapour which is at a pressure smaller than the saturation pressure for the temperature involved is called a __________ vapour.
Q.20
The enthalpy change when ammonia gas is dissolved in water is called the heat of
Q.21
During adiabatic expansion of gas
Q.22
1/V (∂V/∂T)p is the mathematical expression
Q.23
Cp - Cv = R is valid for __________ gases.
Q.24
In case of steady flow compression polytropic process (PVn = constant), the work done on air is the lowest, when
Q.25
In case of a reversible process (following pvn = constant), work obtained for trebling the volume (v₁ = 1 m³ and v₂ 3 m³ ) is max imum, when the value of 'n' is
Q.26
In an adiabatic process, the
Q.27
Which of the following identities can be most easily used to verify steam table data for superheated steam.
Q.28
Pick out the wrong statement.
Q.29
A liquid under pressure greater than its vapour pressure for the temperature involved is called a __________ liquid.
Q.30
The point at which all the three (solid, liquid and gas) phases co-exist, is known as the __________ point.
Q.31
The expression, nRT In P₁/P₂ , is for the____of an ideal gas.
Q.32
Which of the following is not an intensive property?
Q.33
Compound having large heat of formation is
Q.34
The equation DU = Tds - PdV is applicable to infinitesimal changes occuring in
Q.35
The change in Gibbs freee energy for vaporisation of a pure substance is
Q.36
The chemical potential for a pure substance is __________ its partial molal free energy.
Q.37
Which of the following is not an extensive property?
Q.38
In an irreversible process
Q.39
In a reversible process
Q.40
Which of the following is not an intensive property?
Q.41
Pick out the correct statement.
Q.42
For a given substance at a specified temperature, activity is __________ to fugacity.
Q.43
A gas shows deviation from ideal behaviour at
Q.44
Fugacity and pressure are numerically not equal for the gases
Q.45
In any spontaneous process,
Q.46
A change in state involving a decrease in entropy can be spontaneous, only if
Q.47
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
Q.48
For a multicomponent system, the term chemical potential is equivalent to the
Q.49
When liquid and vapour phase of multi-component system are in equilibrium (at a given temperature and pressure), then chemical potential of each component is
Q.50
__________ equation predicts the activity co-efficient from experimental data.
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