Blue litmus turns red in a solution. What does this indicate?
Answer and explanation
Correct answer: The solution is acidic
The governing concept is the colour change of an acid-base indicator. Litmus is a natural indicator: blue litmus changes to red when it is placed in an acidic solution, because the indicator responds to the acidic conditions. Hence option A is correct. A basic solution would turn red litmus blue, while a neutral solution normally causes no such characteristic change. “Metallic” is not a solution nature identified by litmus.
Frequently asked questions
What is the correct answer to this question?
The solution is acidic
Why is this the correct answer?
The governing concept is the colour change of an acid-base indicator. Litmus is a natural indicator: blue litmus changes to red when it is placed in an acidic solution, because the indicator responds to the acidic conditions. Hence option A is correct. A basic solution would turn red litmus blue, while a neutral solution normally causes no such characteristic change. “Metallic” is not a solution nature identified by litmus.
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.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
