Q.1
Which of the following is not correct for a reversible adiabatic process?
Q.2
Requisites of a reversible process is that the
Q.3
The internal energy of an ideal gas does not change in a reversible __________ process.
Q.4
In the equation PVn = constant, if the value of n = y = Cp/Cv, then it represents a reversible __________ process.
Q.5
Pick out the wrong statement.
Q.6
Efficiency of a heat engine working on Carnot cycle between two temperature levels depends upon the
Q.7
Pick out the correct statement.
Q.8
Pick out the wrong statement.
Q.9
Efficiency of a Carnot engine working between temperatures T₁ and T₂ (T₁ < T₂) is
Q.10
Co-efficient of performance for a reversed Carnot cycle working between temperatures T₁ and T₂ (T₁ > T₂) is
Q.11
Heat pump
Q.12
A cylinder contains 640 gm of liquid oxygen. The volume occupied (in litres) by the oxygen, when it is released and brought to standard conditions (0°C, 760 mm Hg) will be __________ litres.
Q.13
Which of the following liquid metals has the highest thermal conductivity?
Q.14
The following heat engine produces power of 100000 kW. The heat engine operates between 800 K and 300 K. It has a thermal efficiency equal to 50% of that of the Carnot engine for the same temperature. The rate at which heat is absorbed from the hot reservoir is
Q.15
Degress of freedom at triple point will be
Q.16
Refrigeration cycle
Q.17
Number of components (C), phase (P) and degrees of freedom (F) are related by Gibbs phase rule as
Q.18
In reactions involving solids and liquids (where change in volume is negligible), the heat of reaction at constant pressure as compared to that at constant volume is
Q.19
High pressure steam is expanded adiabati-cally and reversibly through a well insulated turbine, which produces some shaft work. If the enthalpy change and entropy change across the turbine are represented by ΔH and ΔS respectively for this process:
Q.20
Compressibility factor of a gas is
Q.21
(∂E/∂T)V is the mathematical expression for
Q.22
(∂H/∂T)p is the mathematical expression for
Q.23
A refrigerator may be termed as a
Q.24
COP of a refrigerator drawing 1 kW of power per ton of refrigeration is about
Q.25
The number of degree of freedom for an azeotropic mixture of ethanol and water in vapour-liquid equilibrium, is
Q.26
Gibbs free energy of a pure fluid approaches __________ as the pressure tends to zero at constant temperature.
Q.27
In the equation, PVn = Constant, if the value of n = 0, then it represents a reversible __________ process.
Q.28
(∂T/∂P)H is the mathematical expression for
Q.29
A refrigeration cycle is the same as a __________ cycle,
Q.30
In the decomposition of PCl5 represented by, PCl5 ⇋ PCl3 + Cl₂, decrease in the pressure of the system will __________ the degree of dissociation of PCl5.
Q.31
The four properties of a system viz. P, V, T, S are related by __________ equation.
Q.32
Out of the following refrigration cycles, which one has the minimum COP (Co-efficient of performance)?
Q.33
Heat of reaction is
Q.34
Melting of ice exemplifies a/an
Q.35
Entropy change for an irreversible process taking system and surrounding together is
Q.36
Melting of wax is accompanied with __________ in entropy.
Q.37
Joule-Thomson co-efficient for a perfect gas is
Q.38
Which of the following is not affected by temperature changes?
Q.39
Forward reaction will be favoured for the exothermic reaction, represented by CO + H₂O ⇋ CO₂ + H₂, by
Q.40
The unit of equilibrium constant of a chemical reaction is the same as that of
Q.41
Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are
Q.42
Refrigeration capacity of a household refrigerator may be round about __________ tons.
Q.43
All gases during throttling process at atmospheric temperature and pressure show a cooling effect except
Q.44
Activity co-efficient is a measure of the
Q.45
The main feature of Carnot refrigeration cycle is that, it
Q.46
The principle applied in liquefaction of gases is
Q.47
For a cyclic process, a fixed ratio between heat and work
Q.48
During a reversible isothermal expansion of an ideal gas, the entropy change is
Q.49
When a gas in a vessel expands, its internal energy decreases. The process involved is
Q.50
Minimum number of phases that exists in a system is 1. Number of chemical species in a colloidal system is
0 h : 0 m : 1 s