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 nature of the solution. In an acidic or neutral medium it is generally colourless, but in a basic medium it changes to pink; therefore option A is correct. Colourless is the acidic-side observation, while blue and yellow are not the characteristic phenolphthalein colour in a basic solution.
Frequently asked questions
What is the correct answer to this question?
Pink
Why is this the correct answer?
Phenolphthalein is an acid–base indicator whose colour depends on the nature of the solution. In an acidic or neutral medium it is generally colourless, but in a basic medium it changes to pink; therefore option A is correct. Colourless is the acidic-side observation, while blue and yellow are not the characteristic phenolphthalein colour in a basic solution.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
