You have three test tubes X, Y and Z half-filled with different solutions, as X is filled with sodium chloride solution, Y is filled with sodium hydroxide solution and Z is filled with dilute hydrochloric acid. On adding one drop of phenolphthalein solution to each of the above solutions, you would observe the solutions in the test tubes as
  • 1

    X is pink; Y is pink and Z is colourless

  • 2

    X is colourless; Y is pink and Z is colourless

  • 3

    X is pale green; Y is colouricss and Z is red

  • 4

    X is colourless; Y is pale green and Z is pink

Answer:- 2
Explanation:-

 Phenolphthalein is a weak acid so it is colourless in acidic solution, pink in basic solution and since NaCl is neutral so it remains colourless when neutral.

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