Question

this indicator shows no colour in acidic medium​

Answer 1

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. It belongs to the class of dyes known as phthalein dyes.

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Answer 2

Answer:

phenolphthalein is your answer it doesn't show any colour in acidic medium but pink colour in basic medium