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?
Detailed Explanation:
Red litmus paper turns blue only in the presence of a basic (alkaline) solution.
Distilled water is neutral (pH 7) and does not change litmus colour; acidic solutions turn blue litmus red, not the reverse; only bases have the chemical property to convert red litmus to blue.
Question 6 of 8 Acids, Bases and Salts
Practice PYQ questions from this topic across all years
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Why does dry HCI gas not change the colour of dry litmus paper?