You have been provided with three test tubes. One of them contains distilled water and the other two contains an acidic solution and a basic solution respectively. If you are given red litmus paper, how will you identify the contents of each test tube?

Dear Student
Put the given red litmus paper in each of the three test tubes.The solution which turns the red litmus paper to blue is basic.
Now, put this blue litmus paper in the remaining two test tubes.The one which turns it red again is acidic.
The test tube which has no effect on either red or blue litmus paper is distilled water.

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