1. Mirrors real exam patterns
Items range from straight‑from‑NCERT checks to JEE/NEET style twists on rms speed, γ, and equipartition, so your practice stays aligned with what paper‑setters actually ask.
🎯 Knowledge Check
Physics — KINETIC THEORY
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Frequently Asked Questions
It is a theory that explains the macroscopic properties of gases (pressure, temperature, volume) in terms of the microscopic motion of gas molecules.
Gas consists of a large number of molecules in random motion; intermolecular forces are negligible except during collisions; collisions are elastic; molecular size is negligible compared to separation.
An ideal gas is a hypothetical gas that obeys the equation \(PV = nRT\) exactly at all pressures and temperatures.
Because real gases have finite molecular size and intermolecular forces, which cause deviations at high pressure and low temperature.
\(PV = nRT\), where \(P\) is pressure, \(V\) volume, \(n)\ number of moles, \(R)\ gas constant, and \(T\) absolute temperature.
\(R = 8.314, \text{J mol}^{-1}\text{K}^{-1}\).
It is the constant that relates temperature to energy at the molecular level: \(k_B = 1.38 \times 10^{-23},\text{J K}^{-1}\).
Pressure arises due to momentum transfer when gas molecules collide elastically with the walls of the container.
\(P = \frac{1}{3}\frac{Nm}{V}\overline{c^2}\).
Temperature is a measure of the average translational kinetic energy of gas molecules.
\(\overline{E_k} = \frac{3}{2}k_B T\).
No, it depends only on temperature.
It is defined as \(c_{\text{rms}} = \sqrt{\overline{c^2}} = \sqrt{\frac{3RT}{M}}\).
It is the speed possessed by the maximum number of molecules at a given temperature.
It is the average speed of all molecules in a gas.