What effect does a basic solution have on red litmus paper?
Answer and explanation
Correct answer: Red litmus turns blue
The governing concept is the use of litmus as an acid-base indicator. A basic solution produces hydroxide ions in water and changes red litmus to blue, so option B is correct. Option C is the characteristic response of blue litmus to an acid. Options A and D do not describe the normal result of testing a basic solution with red litmus.
Frequently asked questions
What is the correct answer to this question?
Red litmus turns blue
Why is this the correct answer?
The governing concept is the use of litmus as an acid-base indicator. A basic solution produces hydroxide ions in water and changes red litmus to blue, so option B is correct. Option C is the characteristic response of blue litmus to an acid. Options A and D do not describe the normal result of testing a basic solution with red 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.
