Difficulty distribution
How the classified questions are distributed by difficulty.
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Practice Thermodynamics - Physical Chemistry - Chemistry previous year questions organised from real papers, with year-wise coverage and clear topic navigation.
Every graph below is calculated only from this selection.
Year-wise coverage for Thermodynamics. Each bar uses a separate theme-derived color.
How the classified questions are distributed by difficulty.
MCQ, numerical, multiple-select and other formats found in these papers.
Top subjects by unique question coverage.
Top topics across the included previous year papers.
Top subtopics inside this exact selection.
Question coverage for the most populated papers. Every active PYP paper remains listed below.
Newest papers appear first. Sort by year, question coverage or name.
| Paper | Year / session | Questions in this view | Open |
|---|---|---|---|
| MHT CET (PCB) 2025 9th April Morning Shift | 2025 | 2 | View paper |
| MHT CET 2025 19TH APRIL EVENING SHIFT | 2025 | 3 | View paper |
| MHT CET 2025 19TH APRIL MORNING SHIFT | 2025 | 3 | View paper |
| MHT CET 2025 20TH APRIL EVENING SHIFT | 2025 | 3 | View paper |
| MHT CET 2025 20TH APRIL MORNING SHIFT | 2025 | 3 | View paper |
| MHT CET 2025 21ST APRIL EVENING SHIFT | 2025 | 3 | View paper |
| MHT CET 2025 21ST APRIL MORNING SHIFT | 2025 | 3 | View paper |
| MHT CET 2025 22ND APRIL EVENING SHIFT | 2025 | 3 | View paper |
| MHT CET 2025 22ND APRIL MORNING SHIFT | 2025 | 3 | View paper |
| MHT CET 2025 23RD APRIL EVENING SHIFT | 2025 | 3 | View paper |
| MHT CET 2025 23RD APRIL MORNING SHIFT | 2025 | 3 | View paper |
| MHT CET 2025 25TH APRIL EVENING SHIFT | 2025 | 3 | View paper |
| MHT CET 2025 25TH APRIL MORNING SHIFT | 2025 | 3 | View paper |
| MHT CET 2025 26TH APRIL EVENING SHIFT | 2025 | 3 | View paper |
| MHT CET 2025 26TH APRIL MORNING SHIFT | 2025 | 3 | View paper |
| MHT CET 2025 5TH MAY EVENING SHIFT | 2025 | 3 | View paper |
| MHT CET (PCB) 2024 22th April Evening Shift | 2024 | 1 | View paper |
| MHT CET (PCB) 2024 22th April Morning Shift | 2024 | 2 | View paper |
| MHT CET 2024 10TH MAY EVENING SHIFT | 2024 | 3 | View paper |
| MHT CET 2024 10TH MAY MORNING SHIFT | 2024 | 3 | View paper |
| MHT CET 2024 11TH MAY EVENING SHIFT | 2024 | 3 | View paper |
| MHT CET 2024 11TH MAY MORNING SHIFT | 2024 | 3 | View paper |
| MHT CET 2024 15TH MAY EVENING SHIFT | 2024 | 3 | View paper |
| MHT CET 2024 15TH MAY MORNING SHIFT | 2024 | 3 | View paper |
| MHT CET 2024 16TH MAY EVENING SHIFT | 2024 | 3 | View paper |
| MHT CET 2024 16TH MAY MORNING SHIFT | 2024 | 2 | View paper |
| MHT CET 2024 2ND MAY EVENING SHIFT | 2024 | 3 | View paper |
| MHT CET 2024 2ND MAY MORNING SHIFT | 2024 | 3 | View paper |
| MHT CET 2024 3RD MAY EVENING SHIFT | 2024 | 3 | View paper |
| MHT CET 2024 3RD MAY MORNING SHIFT | 2024 | 3 | View paper |
| MHT CET 2024 4TH MAY EVENING SHIFT | 2024 | 3 | View paper |
| MHT CET 2024 4TH MAY MORNING SHIFT | 2024 | 3 | View paper |
| MHT CET 2024 9TH MAY EVENING SHIFT | 2024 | 3 | View paper |
| MHT CET 2024 9TH MAY MORNING SHIFT | 2024 | 3 | View paper |
| MHT CET 2023 10TH MAY EVENING SHIFT | 2023 | 3 | View paper |
| MHT CET 2023 10TH MAY MORNING SHIFT | 2023 | 3 | View paper |
| MHT CET 2023 11TH MAY EVENING SHIFT | 2023 | 3 | View paper |
| MHT CET 2023 11TH MAY MORNING SHIFT | 2023 | 3 | View paper |
| MHT CET 2023 12TH MAY EVENING SHIFT | 2023 | 3 | View paper |
| MHT CET 2023 12TH MAY MORNING SHIFT | 2023 | 3 | View paper |
| MHT CET 2023 13TH MAY EVENING SHIFT | 2023 | 3 | View paper |
| MHT CET 2023 13TH MAY MORNING SHIFT | 2023 | 4 | View paper |
| MHT CET 2023 14TH MAY EVENING SHIFT | 2023 | 3 | View paper |
| MHT CET 2023 14TH MAY MORNING SHIFT | 2023 | 3 | View paper |
| MHT CET 2023 9TH MAY EVENING SHIFT | 2023 | 3 | View paper |
| MHT CET 2023 9TH MAY MORNING SHIFT | 2023 | 3 | View paper |
| MHT CET 2022 11TH AUGUST EVENING SHIFT | 2022 | 4 | View paper |
| MHT CET 2021 20TH SEPTEMBER EVENING SHIFT | 2021 | 3 | View paper |
| MHT CET 2021 20TH SEPTEMBER MORNING SHIFT | 2021 | 3 | View paper |
| MHT CET 2021 21TH SEPTEMBER EVENING SHIFT | 2021 | 3 | View paper |
| MHT CET 2021 21TH SEPTEMBER MORNING SHIFT | 2021 | 4 | View paper |
| MHT CET 2021 22TH SEPTEMBER EVENING SHIFT | 2021 | 3 | View paper |
| MHT CET 2021 22TH SEPTEMBER MORNING SHIFT | 2021 | 3 | View paper |
| MHT CET 2021 23RD SEPTEMBER EVENING SHIFT | 2021 | 3 | View paper |
| MHT CET 2021 23th September Morning Shift | 2021 | 2 | View paper |
| MHT CET 2021 24TH SEPTEMBER EVENING SHIFT | 2021 | 3 | View paper |
| MHT CET 2021 24TH SEPTEMBER MORNING SHIFT | 2021 | 3 | View paper |
| MHT CET 2020 16TH OCTOBER EVENING SHIFT | 2020 | 2 | View paper |
| MHT CET 2020 16TH OCTOBER MORNING SHIFT | 2020 | 3 | View paper |
| MHT CET 2020 19TH OCTOBER EVENING SHIFT | 2020 | 3 | View paper |
| MHT CET 2019 2ND MAY EVENING SHIFT | 2019 | 3 | View paper |
| MHT CET 2019 2ND MAY MORNING SHIFT | 2019 | 3 | View paper |
| MHT CET 2019 3RD MAY MORNING SHIFT | 2019 | 4 | View paper |
Practice every matching question in batches of 20, with every available option.
Identify the equation in which change in enthalpy is equal to change in internal energy
Two moles of an ideal gas is expanded isothermally and reversibly at 300 K from 1 L to 10 L . The enthalpy change in kJ is
\(\begin{aligned} & \text { If } \mathrm{C}(s)+\mathrm{O}_2(g) \rightarrow \mathrm{CO}_2(g), \Delta H=-X \\ & \mathrm{CO}(g)+\frac{1}{2} \mathrm{O}_2(g) \rightarrow \mathrm{CO}_2(g), \Delta H=-Y \[\end{aligned}\) Calculate $\Delta_f H$ for $\mathrm{CO}_{(g)}$ formation\]
Three moles of an ideal gas are expanded isothermally from a volume of $300 \mathrm{~cm}^3$ to 2.5 L at 300 K against a pressure of 1.9 atm . The work done in joules is
Calculate the difference between heat of combustion of carbon monoxide gas at constant pressure and at constant volume at $27^{\circ} \mathrm{C} ?\left(R=2 \mathrm{cal} \mathrm{K}^{-1} \mathrm{~mol}^{-1}\right)$
For a process, entropy change of a system is expressed as
A gas performs 0.320 kJ work on surrounding and absorbs 120 J of heat from the surrounding. Hence, change in internal energy is
The temperature of $32^{\circ} \mathrm{C}$ is equivalent to
Based on first law of thermodynamics which of the following is correct
"The mass and energy both are conserved in an isolated system", is the statement of
Work done when 2 mole of an ideal gas is compressed from a volume of \(5 \mathrm{~m}^3\) to \(2.5 \mathrm{~m}^3\) at 300 K, under a pressure of 100 kpa is
If entropy of a solid is greater than zero, at \(T=0\), it is called
A sample of gas absorbs \(4000 \mathrm{~kJ}\) of heat and surrounding does \(2000 \mathrm{~J}\) of work on sample. What is the value of \(\Delta U\) ?
An ideal gas expands isothermally and reversibly from \(10 \mathrm{~m}^3\) to \(20 \mathrm{~m}^3\) at \(300 \mathrm{~K}\), performing \(5.187 \mathrm{~kJ}\) of work on surrounding, calculate number of moles of gas used.
If \(38.55 \mathrm{~kJ}\) of heat is absorbed, when 6.0 of \(\mathrm{O}_2\) react \(\mathrm{CIF}\) according to reaction.
$$2 \mathrm{CIF}(g)+\mathrm{O}_2(g) \longrightarrow \mathrm{Cl}_2(g)+\mathrm{OF}_2(g)$$
What is the standard enthalpy of reaction?
For the reaction,
$$\mathrm{N}_2(g)+3 \mathrm{H}_2(g) \longrightarrow 2 \mathrm{NH}_3(g) ; \Delta H$$
is equal to
What is standard $N \equiv N$ bond enthalpy from following reaction,
$$\begin{aligned} & \mathrm{N}_2(g)+3 \mathrm{H}_2(g) \longrightarrow 2 \mathrm{NH}_3(g) ; \Delta H^{\circ}=-83 \mathrm{~kJ} \\ & \left(\Delta H^{\circ}(\mathrm{H}-\mathrm{H})=435 \mathrm{~kJ} ; \Delta H^{\circ}(\mathrm{N}-\mathrm{H})=389 \mathrm{~kJ}\right) \\ \end{aligned}$$
When 6.0 g of graphite reacts with dihydrogen to give methane gas, 37.4 kJ of heat is liberated. What is standard enthalpy of formation of $\mathrm{CH}_4(\mathrm{~g})$ ?
Calculate difference between \(\Delta \mathrm{H}\) and \(\Delta \mathrm{U}\) for following reaction at \(25^{\circ} \mathrm{C}\) ?
$$\mathrm{C}_2 \mathrm{H}_{6(\mathrm{~g})}+3.5 \mathrm{O}_2 \rightarrow 2 \mathrm{CO}_{2(\mathrm{~g})}+3 \mathrm{H}_2 \mathrm{O}_{(l)}\left(\mathrm{R}=8.314 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\right)$$
Calculate heat of formation of \(\mathrm{HCl}\) gas from following reaction.
$$\mathrm{H}_{2(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{~g})} \rightarrow 2 \mathrm{HCl}_{(\mathrm{g})} ; \Delta \mathrm{H}=-194 \mathrm{~kJ}$$
Showing 20 of 186 questions