Heat and Thermodynamics PYQs - Last 10 Years
JEE Advanced / Physics / Mechanics / 41 recent questions
PhysicsMechanics2017-2026
Practice 41 JEE Advanced Physics questions from Heat and 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 10 Years Heat and Thermodynamics Questions
Showing 41 of 41 filtered questions.
1Heat And Thermodynamics
Ten moles of an ideal monoatomic gas, initially in state $\boldsymbol{a}$ at atmospheric pressure and temperature $T_a=27^{\circ} \mathrm{C}$, is enclosed in a metal cylinder of volume $V_0$ fitted with a frictionless piston. The gas is sud...
MCQM+4 / -12026
2Heat And Thermodynamics
As shown in the figure, an insulated container is fitted with a thermally conducting but immovable partition ($P_1$) and a freely movable but thermally insulated piston ($P_2$). The partition $P_1$ with thermal conductivity $K$, cross secti...
INTEGER+4 / -02026
3Heat And Thermodynamics
As shown in the figure, five Carnot engines, each with efficiency $\eta$ and same number of cycles per unit time, are operating between six heat reservoirs. The amount of heat released per cycle by one engine is completely absorbed by the n...
INTEGER+4 / -02026
4Heat And Thermodynamics
A quasi-static cycle of a monoatomic ideal gas contains an isothermal process $(ab)$, followed by an isochoric process $(bc)$ and an adiabatic process $(ca)$ as shown in the figure. The volumes of the gas are $V_1$ and $V_2$ at $a$ and $b$,...
MCQM+4 / -12026
5Heat And Thermodynamics
The left and right compartments of a thermally isolated container of length $L$ are separated by a thermally conducting, movable piston of area $A$. The left and right compartments are filled with $\frac{3}{2}$ and 1 moles of an ideal gas, ...
INTEGER+4 / -02025
6Heat And Thermodynamics
An ideal monatomic gas of $n$ moles is taken through a cycle $W X Y Z W$ consisting of consecutive adiabatic and isobaric quasi-static processes, as shown in the schematic $V-T$ diagram. The volume of the gas at $W, X$ and $Y$ points are, $...
INTEGER+4 / -02025
7Heat And Thermodynamics
The efficiency of a Carnot engine operating with a hot reservoir kept at a temperature of 1000 K is 0.4 . It extracts 150 J of heat per cycle from the hot reservoir. The work extracted from this engine is being fully used to run a heat pump...
MCQM+4 / -22025
8Heat And Thermodynamics
Two identical plates P and Q , radiating as perfect black bodies, are kept in vacuum at constant absolute temperatures $\mathrm{T}_{\mathrm{P}}$ and $\mathrm{T}_{\mathrm{Q}}$, respectively, with $\mathrm{T}_{\mathrm{Q}}<\mathrm{T}_{\mathrm{...
INTEGER+4 / -02025
9Heat And Thermodynamics
A spherical soap bubble inside an air chamber at pressure $P_0=10^5 \mathrm{~Pa}$ has a certain radius so that the excess pressure inside the bubble is $\Delta P=144 \mathrm{~Pa}$. Now, the chamber pressure is reduced to $8 P_0 / 27$ so tha...
INTEGER+4 / -02024
10Heat And Thermodynamics
One mole of a monatomic ideal gas undergoes the cyclic process $\mathrm{J} \rightarrow \mathrm{K} \rightarrow \mathrm{L} \rightarrow \mathrm{M} \rightarrow \mathrm{J}$, as shown in the P-T diagram.
Match the quantities mentioned in List-...
Match the quantities mentioned in List-...
MCQ+3 / -12024
11Heat And Thermodynamics
The specific heat capacity of a substance is temperature dependent and is given by the formula $C=k T$, where $k$ is a constant of suitable dimensions in SI units, and $T$ is the absolute temperature. If the heat required to raise the tempe...
INTEGER+4 / -02024
12Heat And Thermodynamics
When the chimney is closed using a cap at the top, a pressure difference $\Delta P$ develops between the top and the bottom surfaces of the cap. If the changes in the temperature and density of the hot air, due to the stoppage of air flow, ...
INTEGER+3 / -02023
13Heat And Thermodynamics
Considering the air flow to be streamline, the steady mass flow rate of air exiting the chimney is _________ $\mathrm{gm} \mathrm{s}^{-1}$.
INTEGER+3 / -02023
14Heat And Thermodynamics
One mole of an ideal gas undergoes two different cyclic processes I and II, as shown in the $P-V$ diagrams below. In cycle I, processes $a, b, c$ and $d$ are isobaric, isothermal, isobaric and isochoric, respectively. In cycle II, processes...
INTEGER+4 / -02023
15Heat And Thermodynamics
An ideal gas is in thermodynamic equilibrium. The number of degrees of freedom of a molecule of the gas is $n$. The internal energy of one mole of the gas is $U_n$ and the speed of sound in the gas is $\mathrm{v}_n$. At a fixed temperature ...
MCQ+3 / -12023
16Heat And Thermodynamics
Match the temperature of a black body given in List-I with an appropriate statement in List-II, and choose the correct option.
[Given: Wien's constant as $2.9 \times 10^{-3} \mathrm{~m}-\mathrm{K}$ and $\frac{h c}{e}=1.24 \times 10^{-6} \ma...
[Given: Wien's constant as $2.9 \times 10^{-3} \mathrm{~m}-\mathrm{K}$ and $\frac{h c}{e}=1.24 \times 10^{-6} \ma...
MCQ+3 / -12023
17Heat And Thermodynamics
A closed container contains a homogeneous mixture of two moles of an ideal monatomic gas $(\gamma=5 / 3)$ and one mole of an ideal diatomic gas $(\gamma=7 / 5)$. Here, $\gamma$ is the ratio of the specific heats at constant pressure and con...
INTEGER+4 / -02023
18Heat And Thermodynamics
One mole of an ideal gas expands adiabatically from an initial state $\left(T_{\mathrm{A}}, V_0\right)$ to final state $\left(T_{\mathrm{f}}, 5 V_0\right)$. Another mole of the same gas expands isothermally from a different initial state $\...
MCQ+3 / -12023
19Heat And Thermodynamics
In the given $P-V$ diagram, a monoatomic gas $\left(\gamma=\frac{5}{3}\right)$ is first compressed adiabatically from state $A$ to state $B$. Then it expands isothermally from state $B$ to state $C$. [Given: $\left(\frac{1}{3}\right)^{0.6} ...
MCQM+4 / -22022
20Heat And Thermodynamics
List I describes thermodynamic processes in four different systems. List II gives the magnitudes (either exactly or as a close approximation) of possible changes in the internal energy of the system due to the process.
.tg {border-collap...
.tg {border-collap...
MCQ+3 / -12022
21Heat And Thermodynamics
The value of \({Q \over {R{T_0}}}\) is
MCQ+3 / -12021
22Heat And Thermodynamics
The value of \({{{T_R}} \over {{T_0}}}\) is
MCQ+3 / -12021
23Heat And Thermodynamics
A soft plastic bottle, filled with water of density 1 gm/cc, carries an inverted glass test-tube with some air (ideal gas) trapped as shown in the figure. The test-tube has a mass of 5 gm, and it is made of a thick glass of density 2.5 gm/c...
INTEGER+2 / -02021
24Heat And Thermodynamics
A soft plastic bottle, filled with water of density 1 gm/cc, carries an inverted glass test-tube with some air (ideal gas) trapped as shown in the figure. The test-tube has a mass of 5 gm, and it is made of a thick glass of density 2.5 gm/c...
INTEGER+2 / -02021
25Heat And Thermodynamics
A small object is placed at the center of a large evacuated hollow spherical container. Assume that the container is maintained at 0 K. At time t = 0, the temperature of the object is 200 K. The temperature of the object becomes 100 K at t ...
INTEGER+4 / -02021
26Heat And Thermodynamics
An ideal gas undergoes a four step cycle as shown in the P-V diagram below. During this cycle, heat is absorbed by the gas in
MCQ+3 / -12021
27Heat And Thermodynamics
A spherical bubble inside water has radius R. Take the pressure inside the bubble and the water pressure to be p0. The bubble now gets compressed radially in an adiabatic manner so that its radius becomes (R \(-\) a). For a << R the magnitu...
INTEGER+4 / -02020
28Heat And Thermodynamics
A container with 1 kg of water in it is kept in sunlight, which causes the water to get warmer than the surroundings. The average energy per unit time per unit area received due to the sunlight is 700 Wm\(-\)2 and it is absorbed by the wate...
INTEGER+4 / -02020
29Heat And Thermodynamics
A thermally isolated cylindrical closed vessel of height 8 m is kept vertically. It is divided into two
equal parts by a diathermic (perfect thermal conductor) frictionless partition of mass 8.3 kg. Thus the
partition is held initially at a...
equal parts by a diathermic (perfect thermal conductor) frictionless partition of mass 8.3 kg. Thus the
partition is held initially at a...
INTEGER+3 / -12020
30Heat And Thermodynamics
The filament of a light bulb has surface area 64 mm2
. The filament can be considered as a black
body at temperature 2500 K emitting radiation like a point source when viewed from far. At night
the light bulb is observed from a distance of ...
. The filament can be considered as a black
body at temperature 2500 K emitting radiation like a point source when viewed from far. At night
the light bulb is observed from a distance of ...
MCQM+4 / -22020
31Heat And Thermodynamics
Consider one mole of helium gas enclosed in a container at initial pressure P1 and volume V1. It
expands isothermally to volume 4V1. After this, the gas expands adiabatically and its volume becomes
32V1. The work done by the gas during isot...
expands isothermally to volume 4V1. After this, the gas expands adiabatically and its volume becomes
32V1. The work done by the gas during isot...
INTEGER+4 / -02020
32Heat And Thermodynamics
If the process carried out on one mole of monoatomic ideal gas is as shown in the PV-diagram with \({p_0}{V_0} = {1 \over 3}R{T_0}\), the correct match is,
MCQ+3 / -12019
33Heat And Thermodynamics
If the process on one mole of monatomic ideal gas is as shown in the TV-diagram with \({P_0}{V_0} = {1 \over 3}R{T_0}\), the correct match is,
MCQ+3 / -12019
34Heat And Thermodynamics
A mixture of ideal gas containing 5 moles of monatomic gas and 1 mole of rigid diatomic gas is initially at pressure P0, volume V0, and temperature T0. If the gas mixture is adiabatically compressed to a volume \({{{V_0}} \over 4}\), then t...
MCQM+4 / -12019
35Heat And Thermodynamics
One mole of a monatomic ideal gas goes through a thermodynamic cycle, as shown in the volume versus temperature (V-T) diagram. The correct statement(s) is/are [R is the gas constant]
MCQM+4 / -12019
36Heat And Thermodynamics
One mole of a monatomic ideal gas undergoes four thermodynamic processes as shown schematically in the \(PV\)-diagram below. Among these four processes, one is isobaric, one is isochoric, one is isothermal and one is adiabatic. Match the pr...
MCQ+3 / -12018
37Heat And Thermodynamics
One mole of a monatomic ideal gas undergoes an adiabatic expansion in which its volume becomes eight times its initial value. If the initial temperature of the gas is \(100\,K\) and the universal gas constant \(R=8.0\) $$J\,mo{l^{ - 1}}{K^{...
INTEGER+3 / -02018
38Heat And Thermodynamics
One mole of a monatomic ideal gas undergoes a cyclic process as shown in the figure (where \(V\) is the volume and \(T\) is the temperature). Which of the statements below is (are) true?
MCQM+4 / -12018
39Heat And Thermodynamics
Which one of the following options correctly represents a thermodynamic process that is used as a correction in the determination of the speed of sound in an ideal gas?
MCQ+3 / -0.752017
40Heat And Thermodynamics
Which of the following options is the only correct representation of a process in which
\(\Delta U = \Delta Q - P\Delta V\)?
\(\Delta U = \Delta Q - P\Delta V\)?
MCQ+3 / -0.752017
41Heat And Thermodynamics
Which one of the following options is the correct combination?
MCQ+3 / -0.752017