Ideal Gas Law and Equation
Learn the ideal gas equation, its relation to physical quantities like pressure, volume, temperature, and density, and its use in describing the behavior of ideal gases.
Why this shows up in the exam
NEET often asks you to use the ideal gas law in calculations and to relate it to other thermodynamic concepts.
How NEET tests this
Practise it
These are real questions from past NEET papers that test this exact idea.
An ideal gas follows a process described by the equation PV² = C from the initial (P₁, V₁, T₁) to the final (P₂, V₂, T₂) thermodynamic states, where C is a constant. Then:
Push further
More challenging2 harder questions built from the past papers above — a step up in difficulty, with distractors designed so you can't get there by elimination. Written and checked by our reviewers, not from a real paper.
A sealed container with a fixed volume of 5 litres holds an ideal gas at 27°C and 3 atm pressure. If the temperature is increased to 127°C, what is the final pressure inside the container? (Assume R = 8.31 J mol^-1 K^-1).
More from Thermodynamics
Thermodynamic Processes and P-V Diagrams
Study different thermodynamic processes (isothermal, isobaric, isochoric, adiabatic, polytropic, cyclic), their definitions, characteristics, and graphical representation on P-V diagrams.
Laws of Thermodynamics
Understand the zeroth and first laws of thermodynamics, including their statements, implications, and applications to physical systems.
Internal Energy, Heat, and Work
Explore the concepts of internal energy, heat, and work, including their definitions, relationships, and how they change during various thermodynamic processes.
Gibbs Free Energy and Spontaneity
Learn how Gibbs free energy determines spontaneity, how to calculate it, and its dependence on temperature, pressure, and other thermodynamic parameters.
Entropy and Its Changes
Understand entropy as a measure of disorder, how it changes in physical and chemical processes, and its calculation in various scenarios including phase transitions and isothermal processes.
Enthalpy Changes and Bond Energies
Learn to calculate enthalpy changes for reactions using bond enthalpies, enthalpy of formation, and Hess's law.