Practice question

Given: In the reaction 2SO₂ + O₂ -> 2SO₃, how many grams of SO₃ are produced from 8 g of O₂ and excess SO₂? (Atomic masses: S = 32, O = 16) Formula: Moles of O₂ = 8 / 32 = 0.25 mol. Substitution & Calculation: 1 mol O₂ produces 2 mol SO₃. Moles of SO₃ = 0.25 × 2 = 0.5 mol. Molar mass of SO₃ = 80 g/mol. Mass = 0.5 × 80 = 40 g. Final Result: The computed value matches expected outcome and confirms correct choice as per latest NCERT 2026-27.