NEET2026Chemistry-Acids, Bases and Salts
NEET 2026 Chemistry Indicators MCQ Question
Type: MCQ-conceptual-Easy-Class 11
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:
A
pinkish red to yellow
B
yellow to pinkish red
C
pink to colourless
D
colourless to pink
Correct Answer
Option D
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.
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