Kinetic Theory of Gases 2026: HSC Physics Question Bank and Important Questions
- Swarangi Nawge
- 8 hours ago
- 4 min read
The Maharashtra Higher Secondary Certificate (HSC) examination is a pivotal milestone for science students. As we approach the 2026 boards, Kinetic Theory of Gases 2026 remains one of the most scoring and fundamental chapters in the Physics syllabus. This chapter, which bridges the gap between Newtonian mechanics and thermodynamics, typically carries a weightage of 5 marks (without options) and 7 marks (with options).
For students aiming for medical entrance exams like NEET or engineering paths, mastering this topic is non-negotiable. This blog provides a structured HSC Physics Question Bank based on the latest SCERT Maharashtra guidelines and an analysis of the last five years of board papers.
Mastering Kinetic Theory of Gases 2026: Chapter Overview
The Kinetic Theory of Gases (KTG) explains the macroscopic properties of gases—such as pressure, temperature, and volume—by considering their molecular composition and motion. In the 2026 syllabus, the State Board emphasizes conceptual clarity and the ability to derive relationships between microscopic variables and macroscopic observables.
Important Concepts for 2026
Ideal Gas Assumptions: The bedrock of the entire chapter.
Pressure of an Ideal Gas: A high-probability 4-mark derivation.
Degrees of Freedom: Crucial for understanding specific heat capacities.
Radiation Laws: Including Stefan-Boltzmann, Wien's Displacement, and Kirchhoff's Law.
HSC Physics Question Bank: Kinetic Theory of Gases 2026
To help you rank high in your preparations, we have categorized the most important questions based on the official Maharashtra Board paper pattern.
Section A: Very Short Answer (1 Mark)
Define the term "Mean Free Path."
State the unit and dimensions of the Boltzmann Constant.
What is the value of the coefficient of emission for a perfect blackbody?
Define an "Athermanous" substance.
State the relation between the average kinetic energy of a molecule and its absolute temperature.
Section B: Short Answer I (2 Marks)
Distinguish between an Ideal Gas and a Real Gas.
State the Law of Equipartition of Energy.
Explain Wien’s Displacement Law with its mathematical form.
Define the Coefficient of Absorption, Reflection, and Transmission.
Derive the expression for the RMS speed of gas molecules in terms of temperature.
Section C: Short Answer II (3 Marks)
State and prove Kirchhoff’s Law of Heat Radiation.
Explain the construction and working of Ferry’s Blackbody with a neat labeled diagram.
Show that for a monoatomic gas, the ratio of specific heats is 5:3.
Derive the Mayer’s Relation for a molar gas constant.
Explain the spectral distribution of blackbody radiation using a graph.
Section D: Long Answer (4 Marks)
Expression for Pressure: Derive the expression for the pressure exerted by an ideal gas on the walls of a container.
Specific Heat Capacities: Discuss the degrees of freedom for monoatomic, diatomic (rigid and non-rigid), and polyatomic gases.
Numerical Problem: A typical board favorite involves calculating the heat radiated by a blackbody when its temperature changes from T 1 to T 2 using Stefan’s Law.
Essential Formula for Quick Revision
In your 2026 exam, you must memorize the following formula names and their applications. Practice these daily to ensure you can replicate the derivations under pressure:
Ideal Gas Equation
Pressure of an Ideal Gas Derivation
Root Mean Square (RMS) Velocity Formula
Average Kinetic Energy per Molecule
Mayer’s Relation
Law of Equipartition of Energy
Stefan-Boltzmann Law of Radiation
Wien’s Displacement Law
Mean Free Path Equation
Pro-Tips for Scoring 100% in KTG
Diagrams are Keys: For questions on Ferry’s Blackbody or Spectral Distribution, a neat, labeled diagram can fetch you full marks even if the theory is slightly brief.
Unit Consistency: In numericals, always convert temperature to Kelvin (K). This is the most common mistake students make in the board exam.
Keyword Focus: Use terms like "elastic collisions," "random motion," and "perfectly black" to impress the examiner.
Official Links and Resources
Maharashtra State Board Official Website: mahahsscboard.in
SCERT Maharashtra Question Bank (Prashnapedhi): maa.ac.in
Download Previous Year Question Papers: Official Paper Section
Conclusion
The Kinetic Theory of Gases 2026 is a high-yield chapter that rewards students who focus on derivations and conceptual definitions. By practicing this HSC Physics Question Bank, you are not just preparing for the 7 marks in the boards but also building a solid foundation for your future scientific endeavors. Stay consistent, practice your diagrams, and keep your formulas on your fingertips.
Frequently Asked Questions (FAQs)
Q1: What are the most repeated questions in Kinetic Theory of Gases for the HSC Board?
A: Historically, the "Derivation of Pressure exerted by an ideal gas" and "Mayer’s Relation" are the most repeated questions. For Kinetic Theory of Gases 2026, we also expect a strong focus on "Degrees of Freedom" due to its relevance in competitive exams.
Q2: Is the Kinetic Theory of Gases important for medical entrance exams?
A: Absolutely. For NEET aspirants, this chapter provides a foundation for Thermodynamics. The 2026 HSC syllabus aligns closely with the NCERT curriculum, making it vital for medical admissions.
Q3: Where can I find the official HSC Physics Question Bank?
A: You can access the official question banks on the SCERT Maharashtra (maa.ac.in) website under the "Prashnapedhi" section.
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