Q.1
While dissolving a gas into a liquid at a constant temperature, the ratio of the concentration of the gas in the solution phase and in the gaseous phase is
Q.2
The number of degrees of freedom at the triple point of water is
Q.3
Pick out the wrong statement.
Q.4
The partial molar enthalpy of a component in an ideal binary gas mixture of composition Z, at a temperature T and pressure P, is a function only of
Q.5
Heat of reaction at constant volume is identified with __________ change.
Q.6
Which of the following is an extensive property of a system?
Q.7
The expression for entropy change, ΔS = n Cp . ln (T₂/T₁), is valid for the __________ of a substance.
Q.8
The extensive properties are
Q.9
The intensive properties are
Q.10
Equilibrium constant decreases as the temperature
Q.11
A solid is transformed into vapour without going to the liquid phase at
Q.12
Internal energy is equal to the heat absorbed in case of a/an __________ process.
Q.13
__________ increases with increase in pressure.
Q.14
Which of the following behaves most closely like an ideal gas?
Q.15
The internal energy of a gas obeying P (V - b) RT (where, b is a positive constant and has a constant Cv), depends upon its
Q.16
When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change. This is called the
Q.17
With increase in reduced temperature, the fugacity co-efficient of a gas at constant reduced pressure
Q.18
Throttling process is a/an __________ process.
Q.19
Fugacity of a component in an ideal gas mixture is euqal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at contant pressure and temperature __________ as its mole fraction increases.
Q.20
Which of the following has the least thermal efficiency?
Q.21
A Carnot cycle consists of the following steps :
Q.22
Gibbs free energy of mixing at constant pressure and temperature is always
Q.23
Heating of water under atmospheric pressure is an __________ process.
Q.24
What happens in a reversible adiabatic compression?
Q.25
Pick out the wrong statement.
Q.26
The kinetic energy of gas molecule is zero at
Q.27
In an isothermal process on an ideal gas, the pressure increases by 0.5 percent. The volume decreases by about __________ percent.
Q.28
The temperature at which both liquid and gas phases are identical, is called the __________ point.
Q.29
The change in __________ is equal to the reversible work for compression in steady state flow process under isothermal condition.
Q.30
As the time is passing, entropy of the universe
Q.31
When a gas is expanded from high pressure region to low pressure region ; temper -ature change occurs. This phenomenon is related to the
Q.32
Fugacity co-efficient of a substance is the ratio of its fugacity to
Q.33
Pick out the wrong statement.
Q.34
The expression for the work done for a reversible polytropic process can be used to obtain the expression for work done for all processes, except reversible __________ process.
Q.35
The equation, PV = nRT, is best obeyed by gases at
Q.36
Which one is true for a throttling process?
Q.37
Fugacity and pressure are numerically equal, when the gas is
Q.38
Lenz's law results from the law of conservation of
Q.39
The variation of heat of reaction with temperature at constant pressure is given by the __________ law.
Q.40
For a stable phase at constant pressure and temperature, the fugacity of each component in a binary system __________ as its mole fraction increases.
Q.41
The effect of changing the evaporator temperature on COP as compared to that of changing the condenser temperature (in vapour compression refrigeration system) is
Q.42
"The fugacity of a gas in a mixture is equal to the product of its mole fraction and its fugacity in the pure state at the total pressure of the mixture". This is
Q.43
Out of the following refrigeration cycles, which one has maximum COP?
Q.44
The efficiency of an Otto engine compared to that of a diesel engine, for the same compression ratio will be
Q.45
In the equation, PVn = constant, if the value of n is in between 1 and y (i.e. Cp/Cv), then it represents a reversible __________ process.
Q.46
In the equation, PVn = constant, if the value of n = ± ∞, then it represents a reversible __________ process.
Q.47
In the equation, PVn = constant, if the value of n = 1, then it represents a reversible __________ process.
Q.48
Pick out the wrong statement.
Q.49
Molar heat capacity of water in equilibrium with ice at constant pressure is __________ Kcal/kg mole . °K
Q.50
Entropy change for an irreversible isolated system is
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