A solution that turns red litmus blue is of which nature?
Answer and explanation
Correct answer: Basic
Litmus changes colour according to the acid-base nature of a solution. A basic or alkaline solution turns red litmus paper blue, so B is correct. An acidic solution shows the opposite change by turning blue litmus red. A neutral solution normally causes no characteristic litmus change, and “oily” describes a physical property rather than an acid-base category. The observation therefore identifies basicity, although it does not give the exact strength of the base.
Frequently asked questions
What is the correct answer to this question?
Basic
Why is this the correct answer?
Litmus changes colour according to the acid-base nature of a solution. A basic or alkaline solution turns red litmus paper blue, so B is correct. An acidic solution shows the opposite change by turning blue litmus red. A neutral solution normally causes no characteristic litmus change, and “oily” describes a physical property rather than an acid-base category. The observation therefore identifies basicity, although it does not give the exact strength of the base.
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.
