Practice question

MCQ

Question

A solution contains 10 g of a non-volatile solute (molar mass 200 g/mol) in 190 g of water. What is the molality of the solution?

Options

Choose one · Correct answer highlighted

0.263 mol/kg Correct 0.526 mol/kg 0.132 mol/kg 0.400 mol/kg

Explanation

Given: A solution contains 10 g of a non-volatile solute (molar mass 200 g/mol) in 190 g of water. What is the molality of the solution? Formula: Moles of solute = 10/200 = 0.05 mol. Substitution & Calculation: Mass of solvent in kg = 190/1000 = 0.19 kg . Molality = 0.05/0.19 = 0.263 mol/kg . Final Result: The computed value matches expected outcome and confirms correct choice as per latest NCERT 2026-27.

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