Heat and Thermodynamics · Physics · WB JEE

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MCQ (Single Correct Answer)

WB JEE 2008
Six molecules have speeds 2 units, 5 units, 3 units, 6 units, 3 units and 5 units respectively. The rms speed is
WB JEE 2008
Which one of the figures gives the temperatures dependance of density of water correctly?
WB JEE 2008
An experiment takes 10 minutes to raise temperature of water from 0$$^\circ$$C to 100$$^\circ$$C and another 55 minutes to convert it totally into ste...
WB JEE 2008
At what temperature will the rms speed of air molecules be double that of NTP?
WB JEE 2008
When the room temperature becomes equal to the dew point, the relative humidity of the room is
WB JEE 2023
Six molecules of an ideal gas have velocities 1, 3, 5, 5, 6 and 5 m/s respectively. At any given temperature, if $$\mathrm{\overline V}$$ and $$\mathr...
WB JEE 2023
A given quantity of gas is taken from A to C in two ways; a) directly from A $$\to$$ C along a straight line and b) in two steps, from A $$\to$$ B an...
WB JEE 2023
Two substances A and B of same mass are heated at constant rate. The variation of temperature $$\theta$$ of the substances with time t is shown in th...
WB JEE 2022
Certain amount of an ideal gas is taken from its initial state 1 to final state 4 through the paths 1 $$\to$$ 2 $$\to$$ 3 $$\to$$ 4 as shown in figure...
WB JEE 2022
Consider a thermodynamic process where integral energy $$U = A{P^2}V$$ (A = constant). If the process is performed adiabatically, then
WB JEE 2022
One mole of a diatomic ideal gas undergoes a process shown in P-V diagram. The total heat given to the gas (ln 2 = 0.7) is ...
WB JEE 2022
One mole of an ideal monoatomic gas expands along the polytrope PV3 = constant from V1 to V2 at a constant pressure P1. The temperature during the pro...
WB JEE 2021
In the given figure, 1 represents isobaric, 2 represents isothermal and 3 represents adiabatic processes of an ideal gas. If $$\Delta$$U1, $$\Delta$$U...
WB JEE 2021
If pressure of real gas O2, in a container is given by $$p = {{RT} \over {2V - b}} - {a \over {4{b^2}}}$$, then the mass of the gas in the container i...
WB JEE 2021
300 g of water at 25$$^\circ$$C is added to 100 g of ice at 0$$^\circ$$C. The final temperature of the mixture is
WB JEE 2020
An ideal gas undergoes the cyclic process abca as shown in the given p - V diagramIt rejects 50J of heat during ab and absorbs 80J of heat during ca. ...
WB JEE 2020
A container AB in the shape of a rectangular parallelopiped of length 5 m is divided internally by a movable partition P as shown in the figure.The le...
WB JEE 2020
When 100 g of boiling water at 100$$^\circ $$ C is added into a calorimeter containing 300 g of cold water at 10$$^\circ $$ C, temperature of the mixt...
WB JEE 2020
A metallic block of mass 20 kg is dragged with a uniform velocity of 0.5 ms-1 on a horizontal table for 2.1 s. The coefficient of static friction betw...
WB JEE 2019
Two black bodies A and B have equal surface areas are maintained at temperatures 27$$^\circ$$C and 177$$^\circ$$C respectively. What will be the ratio...
WB JEE 2019
What will be the molar specific heat at constant volume of an ideal gas consisting of rigid diatomic molecules?
WB JEE 2019
Consider the given diagram. An ideal gas is contained in a chamber (left) of volume V and is at an absolute temperature T. It is allowed to rush freel...
WB JEE 2019
A horizontal fire hose with a nozzle of cross-sectional area $${5 \over {\sqrt {21} }} \times {10^{ - 3}}{m^2}$$ delivers a cubic metre of water in 10...
WB JEE 2019
Two identical blocks of ice move in opposite directions with equal speed and collide with each other. What will be the minimum speed required to make ...
WB JEE 2018
The water equivalent of a calorimeter is 10 g and it contains 50 g of water at 15$$^\circ$$C. Some amount of ice, initially at $$-$$ 10$$^\circ$$C is ...
WB JEE 2018
One mole of a monoatomic ideal gas undergoes a quasistatic process, which is depicted by a straight line joining points $$({V_0},{T_0})$$ and $$({2V_0...
WB JEE 2018
For an ideal gas with initial pressure and volume pi and Vi respectively, a reversible isothermal expansion happens, when its volume becomes V0. Then,...
WB JEE 2017
Temperature of an ideal gas, initially at 27$$^\circ$$C, is raised by 6$$^\circ$$C. The rms velocity of the gas molecules will
WB JEE 2017
2 moles of an ideal monoatomic gas is carried from a state (p0, V0) to state (2p0, 2V0) along a straight line path in a p-V diagram. The amount of hea...

MCQ (More than One Correct Answer)

WB JEE 2023
A cyclic process is shown in p-v diagram and T-S diagram. Which of the following statements is/are true?...
WB JEE 2021
Consider the p - V diagram for 1 mole of an ideal monatomic gas shown in the figure. Which of the following statements is/are true?...
WB JEE 2019
The initial pressure and volume of a given mass of an ideal gas with $$\left( {{{{C_p}} \over {{C_V}}} = \gamma } \right)$$, taken in a cylinder fitte...
WB JEE 2018
Which of the following statement(s) is/are true?"Internal energy of an ideal gas .............."
WB JEE 2017
If the pressure, temperature and density of an ideal gas are denoted by p, T and $$\rho $$, respectively, the velocity of sound in the gas is
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