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 respectivily . if you are qiven only red litmus paper how will you identify the contents of each test tube.
As we put given red litmus paper in each of three test tubes.
-basic solution turns the red litmus paper in to blue color.
-Now as we put this blue litmus paper into acidic solution it turns into again in red color.
-As we put the red or blue litmus color paper into distilled solution, no change in the color is shown.