You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. Which of them will turn red litmus to blue?
- ADistilled water
- BAcid
- CBase
- DMore than one of the above
- ENone of the above
Show answer and explanation
Correct answer: (c) Base
Explanation
A basic solution turns red litmus blue; an acid turns blue litmus red.
Distilled water is neutral, so it causes no colour change on litmus.