Q.1
In an irreversible process
Q.2
In a reversible process
Q.3
Which of the following is not an intensive property?
Q.4
Pick out the correct statement.
Q.5
For a given substance at a specified temperature, activity is __________ to fugacity.
Q.6
A gas shows deviation from ideal behaviour at
Q.7
Fugacity and pressure are numerically not equal for the gases
Q.8
In any spontaneous process,
Q.9
A change in state involving a decrease in entropy can be spontaneous, only if
Q.10
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.11
For a multicomponent system, the term chemical potential is equivalent to the
Q.12
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.13
__________ equation predicts the activity co-efficient from experimental data.
Q.14
Pick out the correct statement.
Q.15
Pick out the wrong statement.
Q.16
Ideal gas law is applicable at
Q.17
Absorption/evolution of heat during conversion of a substance from one allotropic form to another is termed as the heat of
Q.18
Work done may be calculated by the expression ∫p dA for __________ processes.
Q.19
Generation of heat by friction is an example of a/an __________ change.
Q.20
Rotary lime kiln is an example of a/an __________ system.
Q.21
The equation, Cp - Cv = R, is true for __________ gas.
Q.22
Duringthe phase transition, __________ changes.
Q.23
The specific heat of saturated water vapour at 100°C is
Q.24
Consider the reaction, C + O₂ ⇋ CO₂ ;ΔH = - 94 kcal. What will be the value of ΔH for the reaction CO₂ → C + O₂?
Q.25
In a working refrigerator, the value of COP is always
Q.26
Pick out the undesirable property for a good refrigerant.
Q.27
A solid metallic block weighing 5 kg has an initial temperature of 500°C. 40 kg of water initially at 25°C is contained in a perfectly insulated tank. The metallic block is brought into contact with water. Both of them come to equilibrium. Specific heat of block material is 0.4 kJ.kg⁻¹. K⁻¹. Ignoring the effect of expansion and contraction and also the heat capacity to tank, the total entropy change in kJ.kg⁻¹ , K⁻¹ is
Q.28
The partial pressure of each constituent present in an alloy is __________ the total vapor pressure exerted by the alloy.
Q.29
Pick out the extensive property out of the following.
Q.30
Entropy change of mixing two liquid substances depends upon the
Q.31
Ideal refrigeration cycle is
Q.32
Specific volume of an ideal gas is
Q.33
With increase in temperature, the atomic heat capacities of all solid elements
Q.34
When a gas is subjected to adiabatic expansion, it gets cooled due to
Q.35
Sound waves propagation in air exemplifies an __________ process.
Q.36
Which of the following exemplifies an adiabatic process?
Q.37
4 kg moles of an ideal gas expands in vacuum spontaneously. The work done is
Q.38
Which of the following units is not present in both the vapor compression refrigeration system and absorption refrigeration system ?
Q.39
Which is not constant for an ideal gas?
Q.40
Isotherm on an enthalpy-concentration diagram, for an ideal solution will be a
Q.41
Choose the condition that must be specified in order to liquify CO₂ (triple point for CO₂ is - 57°C and 5.2 atm).
Q.42
Entropy is a measure of the __________ of a system.
Q.43
Gibbs free energy per mole for a pure substance is equal to the
Q.44
Change of heat content when one mole of compound is burnt in oxygen at constant pressure is called the
Q.45
Pick out the correct statement:
Q.46
Translational kinetic energy of molecules of an ideal gas is proportional to (where, T = absolute temperature of the gas )
Q.47
If two pure liquid constituents are mixed in any proportion to give an ideal solution, there is no change in
Q.48
What is the value of ln y (where y = activity co-efficient) for ideal gases?
Q.49
__________ calorimeter is normally used for measuring the dryness fraction of steam, when it is very low.
Q.50
The necessary and sufficient condition for equilibrium between two phases is
0 h : 0 m : 1 s