Q.1
On opening the door of an operating refrigerator kept in a closed room, the temperature of the room will
Q.2
The value of gas constant 'R' is
Q.3
With increase in pressure (above atmospheric pressure), the Cp of a gas
Q.4
Work done in case of free expansion is
Q.5
Critical solution temperature (or the con-solute temperature) for partially miscible liquids (e.g., phenol-water) is the minimum temperature at which
Q.6
PVγ = Constant (where, γ = Cp/Cv) is valid for a/an __________ process.
Q.7
In the reaction, represented by, 2SO₂ + O₂ ⇋ 2SO₃; ΔH = - 42 kcal; the forward reaction will be favoured by
Q.8
Third law of thermodynamics is concerned with the
Q.9
Second law of thermodynamics is concerned with the
Q.10
Lowering of condenser temperature (keeping the evaporator temperature constant) in case of vapour compression refrigeration system results in
Q.11
The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called the __________ temperature.
Q.12
Pick out the wrong statement pertaining to the decomposition of PCl5 represented by, PCl5 ⇋ PCl3 + Cl₂.Degree of dissociation of PCl5 will
Q.13
A gas mixture of three components is brought in contact with a dispersion of an organic phase in water. The degree of freedom of the system are
Q.14
In which of the following reaction equilibria, the value of equilibrium constant Kp will be more than is Kc?
Q.15
As the temperature is lowered towards the absolute zero, the value of ∂(ΔF)/∂T, then approaches
Q.16
Trouton's ratio of __________ liquids is calculated using Kistyakowsky equation.
Q.17
The heat capacities for the ideal gas state depend upon the
Q.18
One mole of nitrogen at 8 bar and 600 K is contained in a piston-cylinder arrangement. It is brought to 1 bar isothermally against a resisting pressure of 1 bar. The work done (in Joules) by the gas is
Q.19
Two substances are in equilibrium in a reversible chemical reaction. If the concentration of each substance is doubled, then the value of the equilibrium constant will be
Q.20
Any substance above its critical temperature exists as
Q.21
Those solutions in which there is no volume change upon mixing the components in the liquid state and which, when diluted do not undergo any heat change (i.e. heat of dilution is zero), are called __________ solutions.
Q.22
Internal energy change of a system over one complete cycle in a cyclic process is
Q.23
Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ____with the increase of reduced temperature.
Q.24
Chemical potential is a/an
Q.25
For a real gas, the chemical potential is given by
Q.26
The compressibility factor of a gas is given by (where, V₁ = actual volume of the gas V₂ = gas volume predicted by ideal gas law )
Q.27
Air enters an adiabatic compressor at 300K. The exit temperature for a compression ratio of 3, assuming air to be an ideal gas (Y = Cp/Cv = 7/5) and the process to be reversible, is
Q.28
As the temperature is lowered towards the absolute zero, the value of the quantity (∂ΔF/∂T) approaches
Q.29
Reduced pressure of a gas is the ratio of its
Q.30
An ideal liquid refrigerant should
Q.31
Dry ice is
Q.32
Compressibility factor-reduced pressure plot on reduced co-ordinates facilitates
Q.33
The activity of an ideal gas is numerically __________ its pressure.
Q.34
The temperature at the eutectic point of the system is the __________ temperature that can be attained in the system.
Q.35
Cv for an ideal gas
Q.36
First law of thermodynamics is mathematically stated as
Q.37
A cyclic engine exchanges heat with two reservoirs maintained at 100 and 300°C respectively. The maximum work (in J) that can be obtained from 1000 J of heat extracted from the hot reservoir is
Q.38
For an ideal gas, the chemical potential is given by
Q.39
Boiling of liquid is accompanied with increase in the
Q.40
Entropy of a substance remains constant during a/an __________ change.
Q.41
Which of the following is a thermodynamic property of a system?
Q.42
For a thermodynamic system containing 'x' chemical species, the maximum number of phases that can co-exist at equilibrium is
Q.43
Isobaric process means a constant process.
Q.44
Equilibrium constant of a reaction varies with the
Q.45
Which of the following will increase the volume of a real gas by four times ?
Q.46
__________ decreases during adiabatic throttling of a perfect gas.
Q.47
Cv is given by
Q.48
1m³ of an ideal gas at 500 K and 1000 kPa expands reversibly to 5 times its initial volume in an insulated container. If the specific heat capacity (at constant pressure) of the gas is 21 J/mole . K, the final temperature will be
Q.49
When pressure is applied on the system, ice ⟷ water, then
Q.50
Maximum work that could be secured by expanding the gas over a given pressure range is the __________ work.
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