7th Class Science Acids, Bases and Salts Question Bank Acids, Bases and Salts

  • question_answer How does colourless phenolphthalein change in the presence of bases?

    A)  Remains colourless

    B)  Becomes pink

    C)  Becomes red

    D)  Becomes green

    Correct Answer: B

    Solution :

    In the presence of bases, phenolphthalein changes to pink colour.


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