Question
Which indicator is used in the titration of sodium hydroxide against oxalic acid and what is the colour change at the end point?
NEET
Chemistry
Ionic Equilibrium
2024
NEET 2024 (Re-NEET)
NEET Chemistry Question (2024) — Solution
Options
- A. Phenolphthalein, pink to yellow
- B. Alkaline KMnO _4, colourless to pink
- C. Phenolphthalein, colourless to pink
- D. Methyl orange, yellow to pinkish red colour
Answer
C. Phenolphthalein, colourless to pink
Step-by-step solution
For weak acid and strong base titration, phenolphthalein is used as indicator. In acidic medium phenolphthalein is colourless while in alkaline medium it is pink in colour.
Related: Chemistry — Ionic Equilibrium · All PYQ Banks