Thermodynamics PYQs - Last 5 Years
MHT CET / Chemistry / Physical Chemistry / 180 recent questions
ChemistryPhysical Chemistry2022-2026
Practice 180 MHT CET Chemistry questions from Thermodynamics. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.
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Last 5 Years Thermodynamics Questions
Showing 30 of 180 filtered questions.
1Thermodynamics
For a reaction \(\mathrm{A}+\mathrm{B} \rightarrow\) products \(\Delta \mathrm{H}\) is \(-84.2 \mathrm{~kJ}\) and \(\Delta \mathrm{S}\) is \(-200 \mathrm{~J} \mathrm{~K}^{-1}\). Calculate the highest value of temperature so that the reactio...
MCQ+1 / -02023
2Thermodynamics
Calculate the work done in the following reaction at \(300 \mathrm{~K}\) and at constant pressure.
\(\left(\mathrm{R}=8.314 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\right)\)
$$4 \mathrm{HCl}_{(\mathrm{g})}+\mathrm{O}_{2(\mathrm{~g})}...
\(\left(\mathrm{R}=8.314 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\right)\)
$$4 \mathrm{HCl}_{(\mathrm{g})}+\mathrm{O}_{2(\mathrm{~g})}...
MCQ+1 / -02023
3Thermodynamics
Which of the following temperature values in Fahrenheit \(\left({ }^{\circ} \mathrm{F}\right)\) is equal to \(50^{\circ} \mathrm{C}\) ?
MCQ+1 / -02023
4Thermodynamics
One mole of an ideal gas performs \(900 \mathrm{~J}\) of work on surrounding. If internal energy increases by \(625 \mathrm{~J}\), find the value of \(\Delta \mathrm{H}\).
MCQ+1 / -02023
5Thermodynamics
Which of the following processes exhibits increase in internal energy?
MCQ+1 / -02023
6Thermodynamics
An ideal gas absorbs \(210 \mathrm{~J}\) of heat and undergoes expansion from \(3 \mathrm{~L}\) to \(6 \mathrm{~L}\) against a constant external pressure of \(10^5 \mathrm{~Pa}\). What is the value of \(\Delta U\) ?
MCQ+1 / -02023
7Thermodynamics
Which among the following is intensive and extensive properties respectively?
MCQ+1 / -02023
8Thermodynamics
Two moles of an ideal gas expand freely and isothermally from \(5 \mathrm{~dm}^3\) to \(50 \mathrm{~dm}^3\). What is the value of \(\Delta H\) ?
MCQ+1 / -02023
9Thermodynamics
Calculate amount of methane formed by liberation of \(149.6 \mathrm{~kJ}\) of heat using following equation.
$$\mathrm{C}_{(\mathrm{s})}+2 \mathrm{H}_{2(\mathrm{~g})} \longrightarrow \mathrm{CH}_{4(\mathrm{~g})} \quad \Delta \mathrm{H}=-74....
$$\mathrm{C}_{(\mathrm{s})}+2 \mathrm{H}_{2(\mathrm{~g})} \longrightarrow \mathrm{CH}_{4(\mathrm{~g})} \quad \Delta \mathrm{H}=-74....
MCQ+1 / -02023
10Thermodynamics
For reaction, \(\mathrm{CO}_{(\mathrm{g})}+\frac{1}{2} \mathrm{O}_{2(\mathrm{~g})} \longrightarrow \mathrm{CO}_{2(\mathrm{~g})}\)
Which of the following equations is CORRECT at constant \(\mathrm{T}\) and \(\mathrm{P}\) ?
Which of the following equations is CORRECT at constant \(\mathrm{T}\) and \(\mathrm{P}\) ?
MCQ+1 / -02023
11Thermodynamics
If lattice enthalpy and hydration enthalpy of \(\mathrm{KCl}\) are \(699 \mathrm{~kJ} \mathrm{~mol}^{-1}\) and \(-681.8 \mathrm{~kJ} \mathrm{~mol}^{-1}\) respectively. What is the enthalpy of solution of \(\mathrm{KCl}\) ?
MCQ+1 / -02023
12Thermodynamics
Equal masses in grams of \(\mathrm{H}_2, \mathrm{~N}_2, \mathrm{Cl}_2\), and \(\mathrm{O}_2\), are enclosed in cylinders separately. If these gases expand isothermally and reversibly by \(10 \mathrm{~dm}^3\) at \(300 \mathrm{~K}\), the work...
MCQ+1 / -02023
13Thermodynamics
A gas absorbs \(150 \mathrm{~J}\) heat and expands by \(300 \mathrm{~cm}^3\) against a constant external pressure \(2 \times 10^5 \mathrm{~N} \mathrm{~m}^{-2}\), What is \(\Delta \mathrm{U}\) of the system?
MCQ+1 / -02023
14Thermodynamics
Which among the following is NOT the feature of reversible process?
MCQ+1 / -02023
15Thermodynamics
What is value of PV type of work for following reaction at 1 bar?
$$\underset{(200 \mathrm{~mL})}{\mathrm{C}_2 \mathrm{H}_{4(\mathrm{~g})}}+\underset{(150 \mathrm{~mL})}{\mathrm{HCl}_{(\mathrm{g})}} \longrightarrow \mathrm{C}_2 \mathrm{H}_5...
$$\underset{(200 \mathrm{~mL})}{\mathrm{C}_2 \mathrm{H}_{4(\mathrm{~g})}}+\underset{(150 \mathrm{~mL})}{\mathrm{HCl}_{(\mathrm{g})}} \longrightarrow \mathrm{C}_2 \mathrm{H}_5...
MCQ+1 / -02023
16Thermodynamics
Which among the following is TRUE for isobaric process?
MCQ+1 / -02023
17Thermodynamics
What is the value of increase in internal energy when system does \(8 \mathrm{~J}\) of work on surrounding by supplying \(40 \mathrm{~J}\) of heat to it?
MCQ+1 / -02023
18Thermodynamics
Identify the type of system if boiling water is kept in a half filled closed vessel.
MCQ+1 / -02023
19Thermodynamics
What is the work done during oxidation of 4 moles of \(\mathrm{SO}_{2(\mathrm{~g})}\) to \(\mathrm{SO}_{3(\mathrm{~g})}\) at \(27^{\circ} \mathrm{C}\)?
$$\left(\mathrm{R}=8.314 \mathrm{~J} \mathrm{~K}^{-1(\mathrm{~g})} \mathrm{mol}^{-1}\rig...
$$\left(\mathrm{R}=8.314 \mathrm{~J} \mathrm{~K}^{-1(\mathrm{~g})} \mathrm{mol}^{-1}\rig...
MCQ+1 / -02023
20Thermodynamics
Calculate \(\Delta \mathrm{S}_{\text {total }}\) for the following reaction at \(300 \mathrm{~K}\).
\(\mathrm{NH}_4 \mathrm{NO}_{3(\mathrm{~s})} \longrightarrow \mathrm{NH}_{(\mathrm{aq})}^{+}+\mathrm{NO}_{3(\mathrm{aq})}^{-}\)
$$\left(\Del...
\(\mathrm{NH}_4 \mathrm{NO}_{3(\mathrm{~s})} \longrightarrow \mathrm{NH}_{(\mathrm{aq})}^{+}+\mathrm{NO}_{3(\mathrm{aq})}^{-}\)
$$\left(\Del...
MCQ+1 / -02023
21Thermodynamics
Calculate the final volume when 2 moles of an ideal gas expand from \(3 \mathrm{~dm}^3\) at constant external pressure 1.6 bar and the work done in the process is \(800 \mathrm{~J}\).
MCQ+1 / -02023
22Thermodynamics
What is change in internal energy when system releases \(8 \mathrm{~kJ}\) of heat and performs \(660 \mathrm{~J}\) of work on the surrounding?
MCQ+1 / -02023
23Thermodynamics
The difference between \(\Delta \mathrm{H}\) and \(\Delta \mathrm{U}\) is usually significant for systems consisting of :
MCQ+1 / -02023
24Thermodynamics
If \(8.84 \mathrm{~kJ}\) heat is liberated for formation of \(3 \mathrm{~g}\) ethane, calculate its \(\triangle_{\mathrm{f}} \mathrm{H}^{\circ}\).
MCQ+1 / -02023
25Thermodynamics
Which among the following pair of properties is intensive?
MCQ+1 / -02023
26Thermodynamics
A gas absorbs \(200 \mathrm{~J}\) heat and expands by \(500 \mathrm{~cm}^3\) against a constant external pressure \(2 \times 10^5 \mathrm{~N} \mathrm{~m}^{-2}\). What is the change in internal energy?
MCQ+1 / -02023
27Thermodynamics
What is the heat of formation of \(\mathrm{HCl}_{(\mathrm{g})}\) from following equation?
\(\mathrm{H}_{2(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{g})} \rightarrow 2 \mathrm{HCl}_{(\mathrm{g})} \Delta_{\mathrm{f}} \mathrm{H}=-194 \mathrm{~kJ}\)
\(\mathrm{H}_{2(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{g})} \rightarrow 2 \mathrm{HCl}_{(\mathrm{g})} \Delta_{\mathrm{f}} \mathrm{H}=-194 \mathrm{~kJ}\)
MCQ+1 / -02022
28Thermodynamics
Calculate the work done when 2 moles of an ideal gas expand from a volume of \(5 \mathrm{~dm}^3\) to \(7 \times 10^{-3} \mathrm{~m}^3\) against a constant external pressure of \(2.02 \times 10^5 \mathrm{~Nm}^{-2}\) ?
MCQ+1 / -02022
29Thermodynamics
If \(\mathrm{Q}\) is the heat liberated from the system and \(\mathrm{W}\) is the work done on the system then first law of thermodynamics can be written as,
MCQ+1 / -02022
30Thermodynamics
What is the value of temperature in degree Celsius at absolute zero ?
MCQ+1 / -02022