7th Class Science Acids, Bases and Salts / अम्ल, क्षार एवं लवण Question Bank Acids, Bases and Salts

  • question_answer
    Usefulness of an indicator depends upon change in:

    A) its colour        

    B) its physical state

    C) its temperature            

    D) its pressure

    Correct Answer: A

    Solution :

    Indicators exhibit different colours in acidic and basic solutions.        


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