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

  • question_answer
    Which of the following acid is used by gold smith for dissolving gold?

    A) Nitric acid                   

    B) Sulphuric acid

    C) Aqua regia                  

    D) Hydrochloric acid

    Correct Answer: C

    Solution :

    Aqua regia is used to dissolve gold and platinum.


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