JEE Main 2024 Chemistry question
Only 2 mL of KMnO solution of unknown molarity is required to reach the end point of a titration of 20 mL of oxalic acid (2 M) in acidic medium. The molarity of KMnO solution should be M.
Answer: 8
Solution
2MnO₄⁻ + 5H₂C₂O₄: oxalic acid = 40 mmol needs 16 mmol KMnO₄ in 2 mL, i.e. 8 M.