Phenolphthalein turns pink and methyl orange appears yellow in a solution. What is the nature of the solution?
Answer and explanation
Correct answer: Basic
This question uses indicator colour changes. Phenolphthalein is colourless in acidic or neutral solution but turns pink in a basic solution, so its pink colour is decisive. Methyl orange is yellow in a neutral or basic medium and red in an acidic medium, so yellow supports the same conclusion. Thus the solution is basic and option A is correct; it is not acidic, neutral, or insoluble.
Frequently asked questions
What is the correct answer to this question?
Basic
Why is this the correct answer?
This question uses indicator colour changes. Phenolphthalein is colourless in acidic or neutral solution but turns pink in a basic solution, so its pink colour is decisive. Methyl orange is yellow in a neutral or basic medium and red in an acidic medium, so yellow supports the same conclusion. Thus the solution is basic and option A is correct; it is not acidic, neutral, or insoluble.
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.
