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10th Class Science Sample Paper Science Olympiad Model Test Paper-10

  • question_answer
    The basic nature of soap can be tested by using the indicators such as Phenolphthalein. If we add small amount of soap solution in Phenolphthalein, which one of the following colour change will take place?

    A) Pink colour

    B) No change

    C) Green colour

    D) Yellow colour

    E) None of these

    Correct Answer: A

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