Practice question

Given: What is the molarity of a solution prepared by dissolving 4 g of NaOH in 500 mL of solution? (Molar mass: NaOH = 40 g/mol ) These values define the system as per NCERT data. Formula: Moles of NaOH = 4/40 = 0.1 mol. This is standard NCERT relation. Substitution & Calculation: Volume in liters = 500/1000 = 0.5 L . Molarity = 0.1/0.5 = 0.2 M . Result: The computed value matches expected outcome and confirms correct choice as per NCERT.