What effect does an acidic solution have on blue litmus paper?
Answer and explanation
Correct answer: Turns it red
Litmus is a natural acid-base indicator. In an acidic medium, blue litmus changes to red because the indicator responds to the presence of acidic ions. This red colour is a characteristic test for acidity, although it does not by itself measure the exact pH or strength of the acid. A basic solution generally turns red litmus blue, while green or no change is not the standard result for blue litmus in acid. Thus A is correct.
Frequently asked questions
What is the correct answer to this question?
Turns it red
Why is this the correct answer?
Litmus is a natural acid-base indicator. In an acidic medium, blue litmus changes to red because the indicator responds to the presence of acidic ions. This red colour is a characteristic test for acidity, although it does not by itself measure the exact pH or strength of the acid. A basic solution generally turns red litmus blue, while green or no change is not the standard result for blue litmus in acid. Thus A is correct.
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.
