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Chemistry · 2026

JEE Main · 22 January 2026, Shift 1 · Q54

Choose the correct answer from the options given below:

\begin{table} \captionsetup{labelformat=empty} \caption{Match the LIST-I with LIST-II}
List-I Thermodynamic ProcessList-II Magnitude in kJ
A.Work done in reversible, isothermal expansion of $\displaystyle 2$ mol of ideal gas from $\displaystyle 2 \mathrm{dm}^3$ to $\displaystyle 20 \mathrm{dm}^3$ at $\displaystyle 300$ K.I.$\displaystyle 4$
B.Work done in irreversible isothermal expansion of $\displaystyle 1$ mol ideal gas from $\displaystyle 1 \mathrm{~m}^3$ to $\displaystyle 3 \mathrm{~m}^3$ at $\displaystyle 300$ K against a constant pressure of 3kPa.II.$\displaystyle 11.5$
C.Change in internal energy for adiabatic expansion of a $\displaystyle 1$ mol ideal gas with change of temperature = $\displaystyle 320$ K and $\displaystyle \overline{\mathrm{C}}_{\mathrm{V}}=\frac{3}{2} \mathrm{R}$.III.$\displaystyle 6$
D.Change in enthalpy at constant pressure of $\displaystyle 1$ mol ideal gas with change of temperature $\displaystyle =337 \mathrm{~K}$ and $\displaystyle \overline{\mathrm{C}}_{\mathrm{p}}=\frac{5}{2} \mathrm{R}$.IV.$\displaystyle 7$
\end{table}Choose the correct answer from the options given below:
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JEE Main 2026 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.