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Phenolphthalein is coloured how in acidic and basic media respectively

Question
Phenolphthalein is coloured how in acidic and basic media respectively
Pink in acid, colourless in base
Colourless in acid, pink in base
Red in acid, blue in base
Blue in acid, red in base
Answer
Colourless in acid, pink in base
Detailed Explanation
Phenolphthalein remains colourless in acidic medium and turns pink in basic medium.
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