Litmus is a pH indicator. Red litmus is used to identify bases, and blue litmus is used to identify acids.
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?
Asked in BPSC Prelims Exam 68th · Topic: Acid, Base and Salt (Acid-Base Indicators (Litmus, Phenolphthalein, Methyl Orange, Universal Indicator))
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