Question

You are provided with three test tubes containing distilled water, an acid and a
base solution respectively. If you are given only blue litmus paper, how do you
identify the contents of each test tube?​

Answer 1

Answer:

On litmus paper, the three solutions in the test tubes are poured separately. The solution which turns red litmus to blue contains a basic solution. The solution from the test tube which turns blue litmus paper to red will be the acidic solution and solution of the test tube which do not change either red or blue litmus paper contain water.