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