Practice question

Given: What is the molality of a solution made by dissolving 5 g of urea (molar mass = 60 g/mol) in 200 g of water? Formula: Moles = 5 / 60 = 0.0833 mol. Substitution & Calculation: Mass of solvent = 0.2 kg. Molality = 0.0833 / 0.2 = 0.4165 ≈ 0.417 m. Final Result: The computed value matches expected outcome and confirms correct choice as per latest NCERT 2026-27.