What is the appearance of phenolphthalein in acidic solutions and basic solutions?

Blue / red

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Pink / colourless

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Red / yellow

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Colourless / pink

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Solution

The correct option is D Colourless / pink
Phenolphthalein is originally colourless. Since, it doesn't react with acid, it is colourless in acid. And as it reacts with strong bases, like NaOH, KOH etc, it becomes pink.

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What is the appearance of phenolphthalein in acidic solutions and basic solutions?

The correct option is D Colourless / pinkPhenolphthalein is originally colourless. Since, it doesn't react with acid, it is colourless in acid. And as it reacts with strong bases, like NaOH, KOH etc, it becomes pink.

The correct option is D Colourless / pink
Phenolphthalein is originally colourless. Since, it doesn't react with acid, it is colourless in acid. And as it reacts with strong bases, like NaOH, KOH etc, it becomes pink.