WBJEE SERIES Chemistry
Thermodynamics
12 previous year questions.
Volume: 12 Ques
Yield: Medium
High-Yield Trend
2
2025 2
2022 1
2019 1
2018 1
2016 1
2014 3
2013 1
2010 Chapter Questions 12 MCQs
01
PYQ 2010
medium
chemistry ID: wbjee-20
Which of the following thermodynamic relation is correct ?
1
dG = VdP - SdT
2
dE = PdV + TdS
3
dH = - VdP + TdS
4
dG = VdP + SdT
02
PYQ 2013
medium
chemistry ID: wbjee-20
For isothermal expansion of an ideal gas, the correct combination of the thermodynamic parameters will be
1
$?U = 0, Q=0, w ?
2
$?U ?
3
$?U = 0, Q?
4
$?U = 0, Q?
03
PYQ 2013
medium
chemistry ID: wbjee-20
Pressure-volume work done by an ideal gaseous system at constant volume is (where is internal energy of the system
1
2
Zero
3
4
04
PYQ 2013
medium
chemistry ID: wbjee-20
The standard Gibbs free energy change at 25 C for the dissociation of to is (given, equilibrium constant =
1
2
3
4
05
PYQ 2014
medium
chemistry ID: wbjee-20
For a spontaneous process, the correct statement(s) is (are)
1
2
3
4
06
PYQ 2016
medium
chemistry ID: wbjee-20
The emf of a Daniel cell at 298 K is The cell is When the concentration of is changed to 1M and that of to 0.01M, the emf changes to E2.The relationship between will be
1
2
3
4
07
PYQ 2018
easy
chemistry ID: wbjee-20
During a reversible adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio for the gas is
1
2
3
4
08
PYQ 2019
medium
chemistry ID: wbjee-20
At constant pressure, the heat of formation of a compound is not dependent on temperature, when
1
2
3
4
09
PYQ 2022
medium
chemistry ID: wbjee-20
The average speed of at K is equal to that of at K. The ratio is
1
1:16
2
16:1
3
1:4
4
1:1
10
PYQ 2022
medium
chemistry ID: wbjee-20
Let (Cms)H2 be the r.m.s speed of H2 at 150 K. At what temperature, the most probable speed of helium [(Cmp)He] will be half of (Crms)H2?
1
75K
2
112.5K
3
225K
4
900K
11
PYQ 2025
medium
chemistry ID: wbjee-20
X is an extensive property and x is an intensive property of a thermodynamic system. Which of the following statement(s) is (are) correct?
1
xX is extensive.
2
is intensive.
3
is extensive.
4
is intensive.
12
PYQ 2025
medium
chemistry ID: wbjee-20
Adiabatic free expansion of an ideal gas must be: \} \begin{tabular}{ll}
(A) Isobaric & (B) Isochoric
(C) Isothermal & (D) Isoentropic
\end{tabular}
(C) Isothermal & (D) Isoentropic
\end{tabular}
1
Isobaric
2
Isochoric
3
Isothermal
4
Isoentropic
About Thermodynamics - WBJEE
Thermodynamics is a vital chapter for WBJEE 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.