a
red
b
orange
c
colourless
d
yellow
Explanation
Correct Option
c
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Discussions (9)

cobivictory
5 years ago
Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions.

seaneverdries
11 years ago
it turns colourless in acidic solutions and pink in basic solutions. So there C. Is correct


