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Thermodynamic Systems and the Zeroth Law for JEE: 12 solved questions

Real JEE paper questions on thermodynamic systems and the zeroth law, part of thermodynamics. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2003 to 2026. No sign-in needed to read them.

What this topic asks

• Ideal Gas Equation and Mixtures — 6 questions
• State Variables and the Zeroth Law — 6 questions

All 12 questions with solutions

• One gas of n₁ mole of molecules at temperature T₁, volume V₁ and pressure P₁, and another gas of n₂ mole of m… JEE Main 4th April 1st Shift 2026
• Consider the following statements. A. The zeroth law of thermodynamics gives the concept of temperature. B. T… JEE Main 5th April 1st Shift 2026
• Given below are statements about certain thermodynamic variables. (A) Internal energy, volume V and mass M ar… JEE Main 22nd Jan 2nd Shift 2025
• The pressure of the gas in a constant-volume gas thermometer is 100 cm of mercury when the bulb is placed in… JEE Main 30th June 1st Shift 2022
• A balloon carries a total load of 185 kg at normal pressure and a temperature of 27°C. What load will the bal… JEE Main 27th Aug 1st Shift 2021
• In thermodynamics, heat and work are . JEE Main 16th March 1st Shift 2021
• Which of the following statements is correct for any thermodynamic system? JEE Main 2004
• Which of the following parameters does not characterise the thermodynamic state of matter? JEE Main 2003
• An insulated cylinder of volume 60 cm³ is filled with a gas at 27°C and 2 atmospheres of pressure. The gas is… JEE Main 22nd Jan 2nd Shift 2026
• A closed vessel contains 0.1 mole of a monoatomic ideal gas at 200 K. If 0.05 mole of the same gas at 400 K i… JEE Main 4th Sept 1st Shift 2020
• The change in the magnitude of the volume of an ideal gas when a small additional pressure Δ P is applied at… JEE Main 4th Sept 2nd Shift 2020
• Initially a gas of diatomic molecules is contained in a cylinder of volume V₁ at a pressure P₁ and temperatur… JEE Main 6th Sept 1st Shift 2020