NEET Physics MCQs for Kinetics Theory of Gases Chapter, Check Year Wise MCQs Here

The National Testing Agency has announced the conduction of the National Eligibility cum Entrance Test as the process of admission into various medical courses like MBBS and BDS for the academic session 2026-27 at the registered examination centers in May 2026. All the aspirants of this exam need to start preparing for the exam by studying the subject wise NEET Syllabus 2026 available at the official portal.

In the NEET Physics Syllabus 2026, the NTA has mentioned Kinetics Theory of Gases as one of the important chapters to be studied by the aspirants. To assist all the aspirants with their preparations for this chapter we have added the NEET Physics MCQs for Kinetics Theory of Gases Chapter in the article below.

NEET Physics MCQs for Kinetics Theory of Gases Chapter

The Kinetic Theory of Gases (KTG) is a fundamental topic in NEET Physics, offering a bridge between the microscopic behavior of molecules and the macroscopic properties of gases. Questions from this chapter are generally conceptual and formula-based, making it a high-scoring section if you’ve mastered the key concepts.

This article provides a detailed guide to tackling Multiple Choice Questions (MCQs) from the KTG chapter. We’ll cover essential formulas, concepts, and a few solved examples to help you prepare effectively.

Key Concepts and Formulas

To ace the KTG questions, you must have a firm grasp of the following concepts and their associated formulas.

1. Ideal Gas Equation

An ideal gas is a theoretical gas composed of randomly moving point particles that don’t interact with each other. While real gases aren’t ideal, they behave like ideal gases at high temperatures and low pressures. The ideal gas equation is: $PV=nRT$ Where:

• $P$ = Pressure
• $V$ = Volume
• $n$ = Number of moles
• $R$ = Universal gas constant (8.314J⋅mol−1⋅K−1)
• $T$ = Absolute temperature (in Kelvin)

This can also be written in terms of the number of molecules ($N$): PV=NkB​T Where:

• $N$ = Number of molecules
• kB​ = Boltzmann constant (1.38×10−23J⋅K−1)
• Note: kB​=R/NA​, where NA​ is Avogadro’s number.

2. Kinetic Energy

The average kinetic energy of a molecule is directly proportional to its absolute temperature.

• Average Translational Kinetic Energy per molecule: KEavg​=23​kB​T
• Total Kinetic Energy for $n$ moles: KEtotal​=23​nRT This is independent of the pressure, volume, or nature of the gas. At a given temperature, all ideal gas molecules have the same average kinetic energy, regardless of their mass.

3. Degrees of Freedom

The degrees of freedom ($f$) of a molecule are the number of independent ways in which it can possess energy.

• Monatomic Gas (He, Ne, Ar): $f=3$ (3 translational)
• Diatomic Gas (H₂, O₂, N₂): $f=5$ (3 translational + 2 rotational) at room temperature. At very high temperatures, 2 vibrational degrees of freedom are also active, making $f=7$.
• Polyatomic Gas (CO₂, H₂O): $f=6$ (3 translational + 3 rotational) for non-linear molecules.

4. Law of Equipartition of Energy

According to this law, the total energy of a system is equally distributed among its degrees of freedom. The energy associated with each degree of freedom per molecule is 21​kB​T.

• Internal Energy ($U$) of a gas with $f$ degrees of freedom: U=2f​nRT

5. Specific Heats

• Molar Specific Heat at Constant Volume (CV​): The heat required to raise the temperature of one mole of a gas by one Kelvin at constant volume. CV​=2f​R
• Molar Specific Heat at Constant Pressure (CP​): The heat required to raise the temperature of one mole of a gas by one Kelvin at constant pressure. CP​=CV​+R=(2f​+1)R
• Ratio of Specific Heats ($\gamma$): γ=CV​CP​​=2f​R(2f​+1)R​=1+f2

Pro-Tips for NEET Physics Kinetics Theory of Gases Chapter

Below we have added some of the most usefull and pro tips that can guide and assist aspirants to complete their preparations for the NEET 2026 Exam. Check the tips below:

• Units are Crucial: Always convert all quantities to SI units (e.g., Temperature to Kelvin, Volume to m3). This is the most common mistake students make.
• Master the Postulates: Questions can be theoretical, testing your understanding of the basic assumptions of the Kinetic Theory of Gases. For instance, ideal gas molecules have negligible volume, no intermolecular forces, and perfectly elastic collisions.
• Practice with PYQs: Solving previous year’s questions (PYQs) is the single best way to prepare. They help you understand the question pattern, difficulty level, and important topics within the chapter.
• Derive from the Basics: If you forget a formula, try to derive it from the basic principles, such as the relationship between pressure and kinetic energy (P=31​ρvrms2​) and the ideal gas equation.

Year Wise NEET Physics MCQs for Kinetics Theory of Gases Chapter

In the table listed below, we have added the year wise NEET Physics MCQs for Kinetics Theory of Gases Chapter so that all the students can start preparing accordingly. Click on the links below:

Sharing is caring!