Q.1
An isolated system can exchange __________ with its surroundings.
Q.2
Compressibility factor for almost all the gases are approximately same at the same
Q.3
The melting point of paraffin wax (which contracts on solidification) __________ with pressure rise.
Q.4
Enthalpy of a gas depends upon its
Q.5
The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances. This is the
Q.6
Linde gas liquefaction process employs cooling
Q.7
The first law of thermodynamics is a statement of conservation of
Q.8
In any spontaneous process, the __________ free energy decreases.
Q.9
Gases are cooled in Joule-Thomson expansion, when it is __________ inversion temperature.
Q.10
The compressibility factor for an ideal gas is 1. Its value for any other real gas is
Q.11
Pick out the correct statement.
Q.12
The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of __________ and COP are the same.
Q.13
Domestic refrigerator usually works on the __________ refrigeration cycle.
Q.14
At absolute zero temperature, the __________ of the gas is zero.
Q.15
The expression for entropy change given by, ΔS = nR ln (V₂/V₁) + nCv ln (T₂/T₁) is valid for
Q.16
On a P-V diagram of an ideal gas, suppose a reversible adiabatic line intersects a reversible isothermal line at point A. Then at a point A, the slope of the reversible adiabatic line (∂P/∂V)S and the slope of the reversible isothermal line (∂P/∂V)T are related as (where, y = Cp/Cv) )
Q.17
For an ideal gas, the activity co-efficient is
Q.18
Fundamental principle of refrigeration is based on the __________ law of thermodynamics.
Q.19
Measurement of thermodynamic property of temperature is facilitated by __________ law of thermodynamics.
Q.20
An irreversible process
Q.21
Solid and liquid phases of a substance are in equilibrium at the
Q.22
Trouton's ratio is given by (where λb, = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, °K )
Q.23
Isentropic process means a constant __________ process.
Q.24
For an isothermal process, the internal energy of a gas
Q.25
If two gases have same reduced temperature and reduced pressure, then they will have the same
Q.26
At a given temperature, the volume of a gas dissolved in a solvent __________ with increase in pressure.
Q.27
Chemical engineering thermodynamics is concerned with the __________ in/of chemical processes.
Q.28
At absolute zero temperature, all substances have the same
Q.29
A refrigerator works on the principle of __________ law of thermodynamics.
Q.30
The value of Cp & Cv respectively for monoatomic gases in Kcal/kg Mole . °K are
Q.31
As the entropy of the universe is increasing, day by day, the work producing capacity of a heat engine is
Q.32
Gibbs phase rule finds application, when heat transfer occurs by
Q.33
A gas can be liquified by pressure alone only, when its temperature is __________ its critical temperature.
Q.34
In case of a close thermodynamic system, there is __________ across the boundaries.
Q.35
The expression, ΔG = nRT .In P₂/P₁ , gives the free energy change
Q.36
The thermodynamic law, PVy = constant, is not applicable in case of
Q.37
If heat contents of CH₄, C₂H₄ and C₃H₈ are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH₄(g) + C₂H₄(g) ⇋ C₃H₈(g) will be __________ Kcal.
Q.38
Pick out the wrong statement.
Q.39
Gibbs-Duhem equation
Q.40
Pick out the correct statement.
Q.41
Pick out the wrong statement.
Q.42
Which of the following is Virial equation of state?
Q.43
Which law of the thermodynamics provids basis for measuring the thermodynamic property?
Q.44
There is a change in __________ during the phase transition.
Q.45
Clausius - Clayperon equation is applicable to __________ equilibrium processes.
Q.46
For an ideal gas, the enthalpy
Q.47
dW and dq are not the exact differential, because q and W are
Q.48
Free energy
Q.49
Entropy change of the reaction, H₂O(liquid) H₂O(gas), is termed as the enthalpy of
Q.50
Specific __________ does not change during a phase change (e.g. sublimation, melting, vaporisation etc.).
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