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Isothermal Processes for JEE: 8 solved questions

Real JEE paper questions on isothermal processes, part of thermodynamics. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2009 to 2026. No sign-in needed to read them.

What this topic asks

• Isothermal Work and Heat — 5 questions
• Boyle's Law and Bulk Modulus — 3 questions

All 8 questions with solutions

• An air bubble of volume 1 cm³ rises from the bottom of a lake 40 m deep to the surface at a temperature of 12… JEE Main 8th April 1st Shift 2023
• The thermodynamic process in which the internal energy of the system remains constant is JEE Main 11th April 2nd Shift 2023
• Under isothermal conditions the pressure of a gas is given by P=aV⁻³, where a is a constant and V is the volu… JEE Main 13th April 1st Shift 2023
• Heat is given to an ideal gas in an isothermal process. A. The internal energy of the gas will decrease. B. T… JEE Main 30th Jan 1st Shift 2023
• One mole of an ideal monoatomic gas is compressed isothermally in a rigid vessel to double its pressure at ro… JEE Main 2018
• Two moles of helium gas are taken over the cycle ABCDA shown in the P-T diagram. The work done on the gas in… JEE Main 2009
• A certain gas is isothermally compressed to 1/3 of its initial volume V₀=3 litre by applying the required pre… JEE Main 6th April 1st Shift 2026
• One mole of an ideal gas at 27°C is taken from A to B as shown in the given P-V indicator diagram. The work d… JEE Main 20th July 2nd Shift 2021