NEET 2026 Chemistry Indicators MCQ Question
Phenolphthalein is used as an indicator for the titration of sodium hydroxide solution against a standard solution of oxalic acid. The colour change that is observed at an alkaline pH close to the equivalence point during this titration is:
pinkish red to yellow
yellow to pinkish red
pink to colourless
colourless to pink
Correct Answer
Detailed Explanation
Phenolphthalein is colourless in acidic and neutral solutions and turns pink in alkaline solutions. As the titration approaches the equivalence point, the solution changes from colourless to pink.
Found an issue with this question?
Related Questions
More from 2026
Arrange the following in the correct developmental sequence related to microsporogenesis:
Match List I with List II:
Which of the following statements are correct with respect to DNA separation, isolation and visualization?