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. If you are given only red litmus paper, how will you identify the contents of each test tube ?

You have been provided with three test tubes. One of them contains dis

1.	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. If you are given only red litmus paper, how will you identify the contents of each test tube ?
Answer» Solution :(i) Put red litmus papers one by one in each test tube. The test tube in which the red litmus PAPER turns blue CONTAINS a basic solution. There will be no effect on the red litmus paper in the other two test tubes. Acids, Bases and SALTS 53 (ii) Remove the litmus paper which turned blue and put it one by one in the other test tubes. The tube that turns blue litmus red contains acidic solution. (iii) The tube which has no effect on the litmus paper contains distilled WATER.