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What colour does phenolphthalein show in a basic solution?

Answer and explanation

Correct answer: Pink

Phenolphthalein is a synthetic acid–base indicator. It is colourless in an acidic or sufficiently neutral medium, but its indicator form becomes pink to reddish-pink in a basic solution. Since the question asks specifically about a basic solution, option B, pink, is correct. Colourless belongs to the acidic range, while blue and green are not the standard phenolphthalein result.

Related tags

PhenolphthaleinIndicatorBasic SolutionAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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