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    Question

    Aqua regia, which can dissolve gold, is a freshly

    prepared mixture of concentrated hydrochloric acid and concentrated ______.
    A Formic acid Correct Answer Incorrect Answer
    B Nitric Acid Correct Answer Incorrect Answer
    C Acetic acid Correct Answer Incorrect Answer
    D Phosphoric acid Correct Answer Incorrect Answer

    Solution

    Aqua regia  is a freshly prepared mixture of concentrated hydrochloric acid and concentrated nitric acid in the ratio of 3:1. · It can dissolve gold, even though neither of these acids can do so alone. · Aqua regia is a highly corrosive, fuming liquid. · It is one of the few reagents that can dissolve gold and platinum.

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