Q.1
If an ideal solution is formed by mixing two pure liquids in any proportion, then the __________ of mixing is zero.
Q.2
In a turbine, the fluid expands almost
Q.3
Specific/molar Gibbs free energy for a pure substance does not change during
Q.4
Which is an example of closed system?
Q.5
Entropy of an ideal gas depends upon its
Q.6
Heat is added at constant pressure in an ideal __________ cycle.
Q.7
Heat is added at constant temperature in an ideal __________ cycle.
Q.8
The work done in isothermal compression compared to that in adiabatic compression will be
Q.9
The ammonia synthesis reaction represented by N₂ + 3H₂ ⇋ 2NH₃ ; ΔH = - 22.4 kcal, is
Q.10
The amount of heat required to decompose a compound into its elements is __________ the heat of formation of that compound from its elements.
Q.11
1st law of thermodynamics is nothing but the law of conservation of
Q.12
At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by(where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.)
Q.13
Charles' law for gases states that
Q.14
At triple point (for one component system), vapour pressure of solid as compared to that of liquid will be
Q.15
__________ law of thermodynamics ascertains the direction of a particular spontaneous process.
Q.16
Heat requirement for decomposition of a compound into its elements is __________ that is evolved during the formation of that compound from its elements.
Q.17
In case of the decomposition of hydroiodic acid (2HI ⇋ H₂ + I₂), addition of H₂ (at equilibrium condition) will
Q.18
A gas has a volume of 27.3 c.c. at 0°C. Its volume at 10°C (if pressure remains unchanged) will be __________ c.c.
Q.19
__________ explains the equilibrium constant for any chemical reaction.
Q.20
Claude gas liquefaction process employs cooling
Q.21
Air-refrigeration cycle
Q.22
Grams of butane (C₄H₁₀) formed by the liquefaction of 448 litres of the gas (measured at (STP) would be
Q.23
The adiabatic throttling process of a perfect gas is one of constant enthalpy
Q.24
The total change in the enthalpy of a system is independent of the
Q.25
Joule-Thomson effect i.e., a throttling process is a constant __________ process.
Q.26
__________ does not change during phase transformation processes like sublimation, melting & vaporisation.
Q.27
Adiabatic compression of a saturated water vapour makes it
Q.28
The root mean square speed of molecules of a gas is equal to (where, m = mass of the molecule K = Boltzman's constant, T = absolute temperature)
Q.29
The number of degrees of freedom for an azeotropic mixture in a two component vapour-liquid equilibria is/are
Q.30
The quantitative effect of temperature on chemical equilibrium is given by the
Q.31
Number of phases in a colloidal system are
Q.32
All gases above its inversion temperature, in a throttling process will show
Q.33
Which of the following is an undesirable characteristics of a refrigerant ?
Q.34
Throttling (Joule-Thomson effect) process is a constant __________ process.
Q.35
A refrigeration cycle is a reversed heat engine. Which of the following has the maximum value of the co-efficient of performance (COP) for a given refrigeration effect?
Q.36
A nozzle is a device, which
Q.37
The Joule-Thomson co-efficient is defined as (∂T/∂P)H. Its value at the inversion point is
Q.38
Near their critical temperatures, all gases occupy volumes __________ that of the ideal gas.
Q.39
An isolated system can exchange __________ with its surroundings.
Q.40
Compressibility factor for almost all the gases are approximately same at the same
Q.41
The melting point of paraffin wax (which contracts on solidification) __________ with pressure rise.
Q.42
Enthalpy of a gas depends upon its
Q.43
The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances. This is the
Q.44
Linde gas liquefaction process employs cooling
Q.45
The first law of thermodynamics is a statement of conservation of
Q.46
In any spontaneous process, the __________ free energy decreases.
Q.47
Gases are cooled in Joule-Thomson expansion, when it is __________ inversion temperature.
Q.48
The compressibility factor for an ideal gas is 1. Its value for any other real gas is
Q.49
Pick out the correct statement.
Q.50
The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of __________ and COP are the same.
0 h : 0 m : 1 s