Q.1
For a reversible process involving only pressure-volume work
Q.2
At constant temperature and pressure, for one mole of a pure substance, the ratio of the free energy to the chemical potential is
Q.3
Pick out the wrong statement.
Q.4
Which is not a refrigerant?
Q.5
Work done is a
Q.6
If the vapour pressure at two temperatures of a solid phase in equilibrium with its liquid phase are known, then the latent heat of fusion can be calculated by the
Q.7
If the heat of solution of an ideal gas in a liquid is negative, then its solubility at a given partial pressure varies with the temperature as
Q.8
In an ideal solution, the activity of a component equals its
Q.9
Water on heating from 1 to 4°C
Q.10
Clayperon equation deals with the
Q.11
Pick out the wrong statement:
Q.12
For a constant pressure reversible process, the enthalpy change (ΔH) of the system is
Q.13
In an ideal gas mixture, fugacity of a species is equal to its
Q.14
Pick out the wrong statement.
Q.15
For the gaseous phase chemical reaction, C₂H₄(g) + H₂O(g) ⟷ C₂H₅OH(g), the equilibrium conversion does not depend on the
Q.16
Work done in an adiabatic process between two states depends on the
Q.17
Which is a state function?
Q.18
Degree of freedom of the system ice-water-vapour will be
Q.19
Absolute zero temperature signifies the
Q.20
For an ideal solution, the value of activity co-efficient is
Q.21
The freezing point of a liquid decreases when the pressure is increased, if the liquid __________ while freezing.
Q.22
A/an __________ system is exemplified by a vessel containing a volatile liquid in contact with its vapor.
Q.23
Pick out the wrong statement.
Q.24
As pressure approaches zero, the ratio of fugacity to pressure (f/P) for a gas approaches
Q.25
For an irreversible process involving only pressure-volume work
Q.26
The Carnot co-efficient of performance (COP) of a domestic air conditioner compared to a household refrigerator is
Q.27
The gas law (PV = RT) is true for an __________ change.
Q.28
During Joule-Thomson expansion of gases
Q.29
The entropy change in a reversible isothermal process, when an ideal gas expands to four times its initial volume is
Q.30
The theoretical minimum work required to separate one mole of a liquid mixture at 1 atm, containing 50 mole % each of n- heptane and n- octane into pure compounds each at 1 atm is
Q.31
When liquid and vapour phases of one component system are in equilibrium (at a given temperature and pressure), the molar free energy is
Q.32
If the molar heat capacities (Cp or Cv) of the reactants and products of a chemical reaction are identical, then, with the increase in temperature, the heat of reaction will
Q.33
If the pressure on 100 c.c. of air is halved, then its volume (at the same temperature) would be __________ c.c.
Q.34
At 60° C, vapour pressure of methanol and water are 84.562 kPa and 19.953 kPa respectively. An aqueous solution of methanol at 60° C exerts a pressure of 39.223 kPa; the liquid phase and vapour phase mole fractions of methanol are 0.1686 and 0.5714 respectively. Activity co-efficient of methanol is
Q.35
Free energy change of mixing two liquid substances is a function of the
Q.36
Change of state namely evaportation condensation, freezing and melting is an __________ process.
Q.37
The most important application of distribution law is in
Q.38
When dilute aqueous solutions of two salts are mixed, the process is associated with
Q.39
A system is said to be isopiestic, if there is no __________ change.
Q.40
The energy of activation of exothermic reaction is
Q.41
The equation Tds = dE - PdV applies to
Q.42
In vapour compression refrigeration system, if the evaporator temperature and the condenser temperatures are -13°C and 37°C respetively, the Carnot COP will be
Q.43
The third law of thermodynamics states that the
Q.44
Cp of a gas at its critical temperature and pressure
Q.45
Specific __________ does not change during phase change at constant temperature and pressure.
Q.46
Tea kept in a thermos flask is vigorously shaken. If the tea is considered as a system, then its temperature will
Q.47
Dryness fraction of wet steam is defined as the ratio of mass of vapour in the mixture to the mass of mixture __________ calorimeter is not used for measuring the dryness fraction of steam.
Q.48
Steam undergoes isentropic expansion in a turbine from 5000 kPa and 400°C (entropy = 6.65 kJ/kg K) to 150 kPa) (entropy of saturated liquid = 1.4336 kJ/kg . K, entropy of saturated vapour = 7.2234 kJ/kg. K) The exit condition of steam is
Q.49
Partial molar free energy of an element A in solution is same as its
Q.50
The absolute entropy for all crystalline substances at absolute zero temperature is
0 h : 0 m : 1 s