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

  • question_answer A natural dye extracted from lichens and most commonly used as an indicator. What is its colour in distilled water?

    A) Blue (b)                       

    B) Red

    C) Mauve             

    D) Colourless

    Correct Answer: C

    Solution :

    It is litmus and its colour is mauve (purple) in distilled water. 

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