What colour does blue litmus paper turn in an acidic solution?
Answer and explanation
Correct answer: Red
Litmus is a natural acid-base indicator. In an acidic solution, the indicator changes from blue to red because the acidic medium affects the litmus dye. Therefore option A is correct. Blue litmus remains blue in a neutral solution and generally does not show this red change in a basic solution. Although other indicators may display different colours, the characteristic blue-litmus test for an acid is red.
Frequently asked questions
What is the correct answer to this question?
Red
Why is this the correct answer?
Litmus is a natural acid-base indicator. In an acidic solution, the indicator changes from blue to red because the acidic medium affects the litmus dye. Therefore option A is correct. Blue litmus remains blue in a neutral solution and generally does not show this red change in a basic solution. Although other indicators may display different colours, the characteristic blue-litmus test for an acid is red.
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.
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