MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
Quiz
Chemical Engineering
Chemical Engineering Thermodynamics
Quiz 6
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Q.1
In the reaction, C + O₂ → CO₂ ; ΔH = - 94 kcal. What is the heat content (enthalpy)of O₂?
-94 kcal
> -94 kcal
< - 94 kcal
Zero
Q.2
Standard temperature and pressure (S.T.P.) is
0°C and 750 mm Hg
15°C and 750 mm Hg
0°C and 1 kgf/cm²
15°C and 1 kgf/cm²
Q.3
In case of an __________ process, the temperature of the system increases.
Isothermal compression
Isothermal expansion
Adiabatic expansion
Adiabatic compression
Q.4
What happens in a reversible adiabatic expansion process?
Heating takes place
Cooling takes place
Pressure is constant
Temperature is constant
Q.5
Which of the following is affected by the temperature?
Fugacity
Activity co-efficient
Free energy
All of the above
Q.6
The Maxwell relation derived from the differential expression for the Helmholtz free energy (dA) is
(∂T/∂V)
S
= -(∂P/∂S)
V
(∂S/∂P)
T
= -(∂V/∂T)
P
(∂V/∂S)
P
= (∂T/∂P)
S
(∂S/∂V)
T
= (∂P/∂T)
V
Q.7
Which of the following processes can not be made reversible even under ideal condition of operation?
Free expansion of a gas
Compression of air in a compressor
Expansion of steam in a turbine
All of the above
Q.8
No work is done by the system, when a reaction occurs at constant
Volume
Temperature
Pressure
None of these
Q.9
In the reaction, H₂ +I₂ ⇋ 2HI, addition of an inert gas will
Increase the partial pressure of H₂
Increase the partial pressure of I₂
Increase the total pressure and hence shift the equilibrium towards the right
Not effect the equilibrium conditions
Q.10
Henry's law is closely obeyed by a gas, when its __________ is extremely high.
Pressure
Solubility
Temperature
None of these
Q.11
If an ideal solution is formed by mixing two pure liquids in any proportion, then the __________ of mixing is zero.
Enthalpy
Volume
Both A & B
Neither A nor B
Q.12
In a turbine, the fluid expands almost
Isothermally
Isobarically
Adiabatically
None of these
Q.13
Specific/molar Gibbs free energy for a pure substance does not change during
Sublimation
Vaporisation
Melting
Either A, B or C
Q.14
Which is an example of closed system?
Air compressor
Lquid cooling system of an automobile
Boiler
None of these
Q.15
Entropy of an ideal gas depends upon its
Pressure
Temperature
Both A & B
Neither A nor B
Q.16
Heat is added at constant pressure in an ideal __________ cycle.
Stirling
Brayton
Rankine
Both B and C
Q.17
Heat is added at constant temperature in an ideal __________ cycle.
Stirling
Brayton
Rankine
None of these
Q.18
The work done in isothermal compression compared to that in adiabatic compression will be
Less
More
Same
More or less depending upon the extent of work done
Q.19
The ammonia synthesis reaction represented by N₂ + 3H₂ ⇋ 2NH₃ ; ΔH = - 22.4 kcal, is
Endothermic
Exothermic
Isothermal
Adiabatic
Q.20
The amount of heat required to decompose a compound into its elements is __________ the heat of formation of that compound from its elements.
Less than
More than
Same as
Not related to
Q.21
1st law of thermodynamics is nothing but the law of conservation of
Momentum
Mass
Energy
None of these
Q.22
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.)
μ° + RT ln f
μ°+ R lnf
μ° + T lnf
μ° + R/T lnf
Q.23
Charles' law for gases states that
V/T = Constant
V ∝ 1/T
V ∝ 1/P
PV/T = Constant
Q.24
The standard state of a gas (at a given temperature) is the state in which fugacity is equal to
Unity
Activity
Both A & B
Neither A nor B
Q.25
At triple point (for one component system), vapour pressure of solid as compared to that of liquid will be
More
Less
Same
More or less ; depending on the system
Q.26
__________ law of thermodynamics ascertains the direction of a particular spontaneous process.
Zeroth
First
Second
Third
Q.27
Heat requirement for decomposition of a compound into its elements is __________ that is evolved during the formation of that compound from its elements.
The same
Less than
Greater than
Different than
Q.28
In case of the decomposition of hydroiodic acid (2HI ⇋ H₂ + I₂), addition of H₂ (at equilibrium condition) will
Increase the partial pressure of I₂
Decrease the partial pressure of HI
Diminish the degree of dissociation of HI
None of these
Q.29
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.
2.73
28.3
273
283
Q.30
__________ explains the equilibrium constant for any chemical reaction.
Henry's law
Law of mass action
Hess's law
None of these
Q.31
Claude gas liquefaction process employs cooling
At constant pressure
By throttling
By expansion in an engine
None of these
Q.32
Air-refrigeration cycle
Is the most efficient of all refrigeration cycles
Has very low efficiency
Requires relatively large quantities of air to achieve a significant amount of refrigeration
Both B and C
Q.33
Grams of butane (C₄H₁₀) formed by the liquefaction of 448 litres of the gas (measured at (STP) would be
580
640
1160
Data insufficient; can't be computed
Q.34
The adiabatic throttling process of a perfect gas is one of constant enthalpy
In which there is a temperature drop
Which is exemplified by a non-steady flow expansion
Which can be performed in a pipe with a constriction
In which there is an increase in temperature
Q.35
The total change in the enthalpy of a system is independent of the
Number of intermediate chemical reactions involved
Pressure and temperature
State of combination and aggregation in the beginning and at the end of the reaction
None of these
Q.36
Joule-Thomson effect i.e., a throttling process is a constant __________ process.
Entropy
Temperature
Internal energy
Enthalpy
Q.37
__________ does not change during phase transformation processes like sublimation, melting & vaporisation.
Entropy
Gibbs free energy
Internal energy
All of the above
Q.38
Adiabatic compression of a saturated water vapour makes it
Supersaturated
Superheated
Both A and B
Neither A nor B
Q.39
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)
√(2KT/m)
√(3KT/m)
√(6KT/m)
3KT/m
Q.40
The number of degrees of freedom for an azeotropic mixture in a two component vapour-liquid equilibria is/are
Zero
One
Two
Three
Q.41
The quantitative effect of temperature on chemical equilibrium is given by the
Vant-Hoff equation
Le-Chatelier's principle
Arhenius equation
None of these
Q.42
The relation connecting the fugacities of various components in a solution with one another and to composition at constant temperature and pressure is called the __________ equation.
Gibbs-Duhem
Van Laar
Gibbs-Helmholtz
Margules
Q.43
Number of phases in a colloidal system are
1
2
3
4
Q.44
All gases above its inversion temperature, in a throttling process will show
A heating effect
No change in temperature
A cooling effect
Either A or C
Q.45
Which of the following is an undesirable characteristics of a refrigerant ?
It should be non-explosive
It should have a sub-atmospheric vapor pressure at the temperature in refrigerator coils
Its vapor pressure at the condenser temperature should be very high
None of these
Q.46
Throttling (Joule-Thomson effect) process is a constant __________ process.
Enthalpy
Entropy
Pressure
None of these
Q.47
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?
Vapor compression cycle using expansion valve
Air refrigeration cycle
Vapor compression cycle using expansion engine
Carnot refrigeration cycle
Q.48
A nozzle is a device, which
Increases kinetic energy and decreases pressure
Reduces kinetic energy and increases pressure
Reduces both kinetic energy and pressure
Increases both kinetic energy and pressure
Q.49
The Joule-Thomson co-efficient is defined as (∂T/∂P)
H
. Its value at the inversion point is
∞
1
0
-ve
Q.50
Near their critical temperatures, all gases occupy volumes __________ that of the ideal gas.
Less than
Same as
More than
Half
0 h : 0 m : 1 s
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Support mcqgeeks.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page