CUET-PG SERIES Chemical-thermal-and-polymer-engineering
Thermodynamics
19 previous year questions.
Volume: 19 Ques
Yield: Medium
High-Yield Trend
6
2025 13
2024 Chapter Questions 19 MCQs
01
PYQ 2024
medium
chemical-thermal-and-polymer-engineering ID: cuet-pg-
The approach of the thermodynamic temperature scale is based on:
A. heat engine operating according to Carnot cycle
B. behaviour of a perfect gas
C. behaviour of an ideal liquid
D. principle of reversed heat engine
A. heat engine operating according to Carnot cycle
B. behaviour of a perfect gas
C. behaviour of an ideal liquid
D. principle of reversed heat engine
1
A and D Only
2
A and C Only
3
A and B Only
4
B and D Only
02
PYQ 2024
medium
chemical-thermal-and-polymer-engineering ID: cuet-pg-
Which of the following statements is true?
1
Heat can be fully converted into work
2
Work can be fully converted into heat
3
The efficiency of a heat engine increases as the temperature of the heat source is increased while keeping the temperature of the heat sink fixed
4
A cyclic process can be described when each effect is to transfer heat from a lower temperature to a higher temperature
03
PYQ 2024
medium
chemical-thermal-and-polymer-engineering ID: cuet-pg-
For estimation of heat capacity of a solid compound, one can use
1
Kopp's rule
2
Dulong-Petit's rule
3
Raoult's law
4
Trouton's rule
04
PYQ 2024
medium
chemical-thermal-and-polymer-engineering ID: cuet-pg-
Match List-I with List-II:
| List-I | List-II |
|---|---|
| (A) Heat | (I) State function |
| (B) Internal energy | (II) Path function |
| (C) Work | |
| (D) Entropy |
1
( A- II, B- I, C- I, D- I )
2
( A- II, B- I, C- II, D- II )
3
( A- II, B- II, C- I, D- I )
4
( A- II, B- I, C- II, D- I )
05
PYQ 2024
medium
chemical-thermal-and-polymer-engineering ID: cuet-pg-
Which of the following statements is not valid for an ideal solution?
1
There is no volume change on mixing
2
There is no enthalpy change on mixing
3
It obeys Raoult's law
4
It is always a dilute solution
06
PYQ 2024
medium
chemical-thermal-and-polymer-engineering ID: cuet-pg-
Fugacity is most suitable for
1
Representing actual behavior of real gases
2
Representing ideal behavior of real gases
3
The study of chemical equilibrium involving gases at atmospheric pressure
4
Representing actual behavior of ideal gases
07
PYQ 2024
medium
chemical-thermal-and-polymer-engineering ID: cuet-pg-
Hess’s law of constant heat summation is based on:
1
Zeroth law of thermodynamics
2
First law of thermodynamics
3
Second law of thermodynamics
4
Third law of thermodynamics
08
PYQ 2024
medium
chemical-thermal-and-polymer-engineering ID: cuet-pg-
Gibbs free energy of mixing at constant temperature and pressure must always be
1
zero
2
positive
3
negative
4
infinity
09
PYQ 2024
medium
chemical-thermal-and-polymer-engineering ID: cuet-pg-
For a reversible process at constant pressure and temperature, the free energy change is
1
greater than zero but less than one
2
less than zero
3
equal to zero
4
greater than one
10
PYQ 2024
medium
chemical-thermal-and-polymer-engineering ID: cuet-pg-
Molar entropy of vaporization at normal boiling point in J/K·mole is:
1
80
2
90
3
200
4
92
11
PYQ 2024
medium
chemical-thermal-and-polymer-engineering ID: cuet-pg-
The direction of a particular spontaneous process is ascertained from which of the following Laws of Thermodynamics?
1
zeroth law
2
first law
3
second law
4
third law
12
PYQ 2024
medium
chemical-thermal-and-polymer-engineering ID: cuet-pg-
Which of the following is not an example of a closed system?
1
Solar engine
2
Liquid cooling system of an automobile
3
Balloon in a steam puncture
4
Ice in thermos
13
PYQ 2024
medium
chemical-thermal-and-polymer-engineering ID: cuet-pg-
At a triple point, the number of phases present are
1
one
2
two
3
three
4
four
14
PYQ 2025
easy
chemical-thermal-and-polymer-engineering ID: cuet-pg-
A gaseous system contains , , and which participate in the gas phase reaction:
At a state of reaction equilibrium, the number of thermodynamic degrees of freedom is:
15
PYQ 2025
easy
chemical-thermal-and-polymer-engineering ID: cuet-pg-
From the following list, identify the properties which are equal in both vapor and liquid phases at equilibrium:
(A) Temperature
(B) Density
(C) Enthalpy
(D) Chemical potential
Choose the \textbf{correct} answer from the options given below:
(A) Temperature
(B) Density
(C) Enthalpy
(D) Chemical potential
Choose the \textbf{correct} answer from the options given below:
16
PYQ 2025
medium
chemical-thermal-and-polymer-engineering ID: cuet-pg-
In an internal combustion engine, during the compression strokes, the heat rejected to the cooling water is 75 J/g and the work input is 120 J/g. The change in internal energy of the working fluid is:
1
-45 J/g
2
+45 J/g
3
-195 J/g
4
+195 J/g
17
PYQ 2025
easy
chemical-thermal-and-polymer-engineering ID: cuet-pg-
If the temperature of a saturated water is increased infinitesimally at constant entropy, the resulting state of water is:
18
PYQ 2025
medium
chemical-thermal-and-polymer-engineering ID: cuet-pg-
As pressure approaches zero, the ratio of fugacity to pressure (f/P) for a gas approaches:
1
zero
2
unity
3
infinity
4
an indeterminate value
19
PYQ 2025
medium
chemical-thermal-and-polymer-engineering ID: cuet-pg-
Consider a piston-cylinder arrangement containing a gas. This system is heated by placing it on the top of a burner. The system undergoes:
1
a constant pressure process
2
a constant volume process
3
an adiabatic process
4
an isothermal process
About Thermodynamics - CUET-PG
Thermodynamics is a vital chapter for CUET-PG aspirants. Mastering the concepts covered in this chapter is essential for securing a top rank.
By rigorously practicing the previous year questions associated with this chapter, you can identify high-yield topics, understand the examiner's perspective, and boost your confidence during the actual exam.
Frequently Asked Questions
Why focus on Thermodynamics PYQs?
Analyzing PYQs for this specific chapter reveals the most frequently tested concepts and the typical complexity of questions, allowing you to tailor your study plan efficiently.
How to best use this analysis?
Review the topic breakdown to see which sub-topics within Thermodynamics carry the most weight. Then, tackle the questions iteratively to solidify your understanding.