Verified Solution • 2025–26 Session moderate

QPage 32: Q6: HC Verma: Concepts of Physics - Volume 2 Kinetic Theory of Gases Page 32: Q6 Solution: Consider a gas of neutrons. Do you expect it to behave much…

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often equate lack of electric charge with zero intermolecular forces, concluding neutrons must obey the ideal‑gas law; however, neutrons still experience short‑range nuclear forces and, being fermions, obey quantum statistics that can affect behavior at high density, so the ideal‑gas assumption requires both negligible forces *and* classical distinguishability.

Consider a gas of neutrons. Do you expect it to behave much better as an ideal gas as compared to hydrogen gas at the same pressure and temperature?

Step-by-Step Verified Solution

**Answer:** Yes, a gas of neutrons would behave more ideally than hydrogen at the same pressure and temperature. **Step-by-Step Explanation:** Neutrons are neutral and have negligible intermolecular forces (except nuclear forces at very short range, which are irrelevant at ordinary gas densities). Hydrogen molecules have significant intermolecular attractions (van der Waals forces). Hence, neutrons behave more like an ideal gas.

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