Exams › JEE Main › Physics

Match List I with List II List-I (A) Isothermal Process (B) Adiabatic Process (C) Isochoric Process (D) Isobaric Process List-II (I) Work done by the gas decreases internal energy (II) No change in internal energy (III) The heat absorbed goes partly to increase internal energy and partly to do work (IV) No work is done on or by the gas Choose the correct answer from the options given below: (1) A-I, B-II, C-III, D-IV (2) A-I, B-II, C-IV, D-III (3) A-II, B-I, C-IV, D-III (4) A-II, B-I, C-III, D-IV

1. A-I, B-II, C-III, D-IV
2. A-I, B-II, C-IV, D-III
3. A-II, B-I, C-IV, D-III
4. A-II, B-I, C-III, D-IV

Correct answer: A-II, B-I, C-IV, D-III

Solution

The correct matches reflect the fundamental characteristics of each thermodynamic process: an isothermal process maintains constant internal energy (A-II), an adiabatic process involves work done that decreases internal energy (B-I), an isochoric process has no volume change, thus no work is done (C-IV), and an isobaric process occurs at constant pressure, allowing for work done on or by the gas (D-III).

Related JEE Main Physics questions

• For the equation \((P + a/\sqrt{2})(V - b) = \text{constant}\), what is the dimensional unit of the constant \(a\)?
• A refrigerator operates between \(4^\circ\text{C}\) and \(30^\circ\text{C}\). To maintain its interior at a steady temperature, it must extract 600 calories of heat each second. If 1 calorie = 4.2 joule, the power needed is:
• A diatomic gas with adiabatic index \(\gamma = 1.4\) is initially at a pressure of 2 atm. It is compressed adiabatically until its temperature increases from \(27^\circ\text{C}\) to \(927^\circ\text{C}\). What is the final pressure of the gas?
• A Carnot engine operates with a diatomic ideal gas as its working fluid. During the adiabatic expansion stage, the gas volume rises from \(V\) to \(32V\). What is the efficiency of the engine?
• A spherical cavity of radius $R$ contains black-body radiation at temperature $T$. Treat the radiation as a photon gas with energy density $u=U/V$ proportional to $T^4$ and pressure $p=\frac{1}{3}(U/V)$. If the cavity expands adiabatically, how are $T$ and $R$ related?
• A metal has low-temperature specific heat capacity given by $C=32\left(\frac{T}{400}\right)^3\,\text{J K}^{-1}\text{kg}^{-1}$. If a 100 g container made of this metal is to be cooled from 20 K down to 4 K using a special refrigerator working at room temperature ($27^\circ$C), the work needed for the cooling process is

⚔️ Practice JEE Main Physics free + battle 1v1 →