question_answer

  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?  [NCERT]

Answer:

                  (a) Black currant and strawberry (b) Potato (4.5 - 6.0) (c) Mint (7.0 - 8.0)