Practice question

Given: What is the molarity of a solution prepared by dissolving 4 g of NaOH in water to make 200 mL of solution? (Molar mass of NaOH = 40 g/mol) These values define the system as per NCERT data. Formula: Moles = 4 / 40 = 0.1 mol. This is standard NCERT relation. Substitution & Calculation: Volume = 0.2 L. Molarity = 0.1 / 0.2 = 0.5 M. Result: The computed value matches expected outcome and confirms correct choice as per NCERT.