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Adiabatic Processes for JEE: 28 solved questions

Real JEE paper questions on adiabatic processes, part of thermodynamics. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2006 to 2026. No sign-in needed to read them.

What this topic asks

• Adiabatic Work and Internal Energy — 12 questions
• Adiabatic Relations — 12 questions
• Finding Gamma from an Adiabatic Relation — 4 questions

All 28 questions with solutions

• The initial pressure and volume of a monoatomic ideal gas are P and V. The change in internal energy of this… JEE Main 8th April 2nd Shift 2026
• The volume of an ideal gas increases 8 times and its temperature becomes 1/4 of the initial temperature durin… JEE Main 22nd Jan 1st Shift 2026
• Identify the characteristics of an adiabatic process in a monoatomic gas. (A) Internal energy is constant. (B… JEE Main 2nd April 2nd Shift 2025
• A gas is kept in a container with thermally non-conducting walls. Initially the gas has a volume of 800 cm³ a… JEE Main 3rd April 1st Shift 2025
• A monoatomic gas having γ=5/3 is stored in a thermally insulated container and is suddenly compressed to 1/8… JEE Main 8th April 2nd Shift 2025
• The work done in an adiabatic change in an ideal gas depends only upon JEE Main 29th Jan 1st Shift 2025
• Given below are two statements, one labelled Assertion (A) and the other labelled Reason (R). Assertion (A):… JEE Main 29th Jan 2nd Shift 2025
• A sample of gas at temperature T is adiabatically expanded to double its volume. The adiabatic constant for t… JEE Main 4th April 2nd Shift 2024 (also JEE Main 9th April 1st Shift 2024)
• During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute te… JEE Main 5th April 2nd Shift 2024 (also JEE Main 2003)
• The volume of an ideal gas with γ=1.5 is changed adiabatically from 5 litres to 4 litres. The ratio of the in… JEE Main 9th April 1st Shift 2024
• A gas is compressed adiabatically. Which one of the following statements is NOT true? JEE Main 10th April 2nd Shift 2023
• The initial pressure and volume of an ideal gas are P₀ and V₀. The final pressure of the gas when it is sudde… JEE Main 13th April 2nd Shift 2023
• A hypothetical gas expands adiabatically such that its volume changes from 8 litres to 27 litres. If the rati… JEE Main 31st Jan 2nd Shift 2023
• A monoatomic gas at pressure P and volume V is suddenly compressed to one eighth of its original volume. The… JEE Main 26th July 1st Shift 2022
• Given below are two statements. Statement I: When μ moles of an ideal gas undergo an adiabatic change from th… JEE Main 28th June 1st Shift 2022
• A sample of monoatomic gas is taken at an initial pressure of 75 kPa. The volume of the gas is then compresse… JEE Main 30th June 1st Shift 2022
• A monoatomic ideal gas, initially at temperature T₁, is enclosed in a cylinder fitted with a frictionless pis… JEE Main 25th July 1st Shift 2021
• In an adiabatic process the density of a diatomic gas becomes 32 times its initial value. The final pressure… JEE Main 5th Sept 2nd Shift 2020
• A litre of dry air at STP expands adiabatically to a volume of 3 litres. If γ=1.40, the work done by the air… JEE Main 7th Jan 1st Shift 2020
• A rigid diatomic ideal gas undergoes an adiabatic process at room temperature. The relation between temperatu… JEE Main 11th Jan 1st Shift 2019
• Two moles of an ideal monoatomic gas occupy a volume V at 27°C. The gas expands adiabatically to a volume 2V.… JEE Main 2018
• Consider a spherical shell of radius R at temperature T. The black body radiation inside it can be considered… JEE Main 2015
• An insulated container of gas has two chambers separated by an insulating partition. One of the chambers has… JEE Main 2008
• A work of 146 kJ is performed in order to compress one kilo mole of gas adiabatically, and in this process th… JEE Main 2006
• An ideal gas initially at 0°C is compressed suddenly to one fourth of its volume. If the ratio of the specifi… JEE Main 23rd Jan 1st Shift 2025
• The pressure P₁ and density d₁ of a diatomic gas with γ=7/5 change suddenly to P₂, where P₂>P₁, and d₂ respec… JEE Main 29th July 1st Shift 2022
• A sample of gas with γ=1.5 is taken through an adiabatic process in which the volume is compressed from 1200… JEE Main 31st Aug 2nd Shift 2021
• A vessel contains 0.15 m³ of a gas at a pressure of 8 bar and a temperature of 140°C, with Cₚ=3R and C_V=2R.… JEE Main 2nd April 1st Shift 2026