Question 12 Marks
You have been provided with two test tubes. One of them contains distilled water and the other contain acid solution. How will you find out which of the test tube contains water without testing the contents of the test tube?
Answer
View full question & answer→Take two blue litmus paper strips and one by one dip in both test tubes A and B. The one which changes the colour of the litmus paper to red it is acid and the one which shows no change in color is water.