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What colour does phenolphthalein show in a basic solution?

Answer and explanation

Correct answer: Pink

Phenolphthalein is an acid-base indicator whose colour depends on the pH of the solution. It remains colourless in acidic and nearly neutral conditions, but its indicator form becomes pink in a basic solution. Therefore option B is correct. Colourless corresponds to the acidic side of its test, whereas red and yellow are not the standard phenolphthalein colour for detecting a base.

Related tags

PhenolphthaleinAcid-Base IndicatorBasic SolutionAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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