Practice question

Given: A mixture contains 1 mole of helium and 1 mole of oxygen at 300 K. What is the ratio of their partial pressures? These values define the system as per NCERT data. Formula: For ideal gases, P = μ RT/V, partial pressure propto μ (since V and T are same). This is the standard NCERT relation for this phenomenon. Substitution & Calculation: Ratio fracP_{HeP_{O_2 = fracμ_{Heμ_{O_2 = 1/1 = 1. Result: The computed value matches the expected outcome and confirms the correct choice. Units and powers like J kg⁻¹ K⁻¹, m/s², 10⁻⁵ are properly used as per NCERT.