Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively are
red and blue
blue and red
pink and colourless
colourless and pink
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a colourless crystalline solid (pink in alkaline solution) used as an acid–base indicator and medicinally as a laxative.
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Answer:
● Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively are Colourless and pink.
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