An unknown solution turns red litmus blue and turmeric reddish brown. What is the nature of the solution?
Answer and explanation
Correct answer: Basic
Indicators reveal the nature of a solution through characteristic colour changes. A basic solution turns red litmus blue because it provides an alkaline medium. It also changes yellow turmeric to reddish brown, which is another common test for a base. An acid would turn blue litmus red, while a neutral solution normally causes neither stated change. Therefore the two observations consistently support option B, basic.
Frequently asked questions
What is the correct answer to this question?
Basic
Why is this the correct answer?
Indicators reveal the nature of a solution through characteristic colour changes. A basic solution turns red litmus blue because it provides an alkaline medium. It also changes yellow turmeric to reddish brown, which is another common test for a base. An acid would turn blue litmus red, while a neutral solution normally causes neither stated change. Therefore the two observations consistently support option B, basic.
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.
