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Thermodynamics — JEE Main & Advanced NSEP PYQs

17 previous year questions from Thermodynamics with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

17 questionsNSEPSolutions on every page

The Sun having radius R and surface temperature T , emits radiation as a perfect emitter. The distance of the earth from the sun is r and the radius of the earth is R_ e . The tota

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Graphs (drawn with the same scale) showing the variation of pressure with volume for a certain gas undergoing four different cyclic processes , B , C and D are given below. The cyc

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The molar specific heat of an ideal gas in a certain thermodynamic process is T where is a constant. If the adiabatic exponent is = C_P C_V , the work done in heating the gas from

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Under standard conditions of temperature and pressure a piece of ice melts completely on heating it. Obviously the increase in internal energy of the system (ice and water) is

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If a system is made to undergo a change from an initial state to a final state by adiabatic process only, then

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If the average mass of a smoke particle in an Indian kitchen is 3 10⁻¹⁷ ~kg , the rms speed of the smoke particles at 27^ C is approximately

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A gas is made to undergo a change of state from an initial state to a final state along different paths by adiabatic process only. Therefore,

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An ideal gas is expanding such that PT ^3= constant. The coefficient of volume expansion of the gas is

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One mole of a gas with = 5 3 is mixed with two moles of another non-interacting gas with = 7 5 The ratio of specific heats = C_P C_V of mixture is approximately

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The molar specific heat capacity of a certain gas is expressed as C=C_V+ P T . The equation of state for the process can be written as ( & ~A are constant)

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Consider the process of the melting of a spherical ball of ice originally at 0^ Assuming that the heat is being absorbed uniformly through the surface and the rate of absorption is

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The work done by the three moles of an ideal gas in the cyclic process A B C D shown in the diagram is approximately. Given that T ₁=100 ~K , ~T ₂=200 ~K and T ₃=600 ~K , ~T ₄=300

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An ideal monatomic gas is confined within a cylinder by a spring loaded piston of cross-sectional area 4 10⁻³ ~m ^2 . Initially the gas is at 400 K and occupies a volume 2 10⁻³ ~m

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Two identical Carnot (cycles) engines operate between maximum and minimum temperatures T ₁ and T ₂ and volume limits, V ₂, ~V _ b , V _ c & ~V _ d as shown in figure. Given that V

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Two Carnot heat engines are connected in series such that the sink of the first engine is heat source of the second. Efficiency of the engines are ₁ and ₂ respectively. Net efficie

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An ideal gas ( n moles) is initially at pressure P and temperature T . It is cooled isochorically to a pressure P 4 . The gas is then expanded at a constant pressure so as to attai

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Two moles of nitrogen in a container, of negligible thermal capacity, are initially at 17^ C . The gas is compressed adiabatically from an initial volume of 120 liter to 80 liter.

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