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Asked: August 21, 20222022-08-21T10:12:42+00:00 2022-08-21T10:12:42+00:00In: Chemistry

Which acid is used for cleaning gold ornaments?

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  1. Nitric acid
  2. Boric acid
  3. Sulphuric acid
  4. Oxalic acid
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    1. Best Answer
      Exampix Verified
      2022-08-21T10:13:07+00:00Added an answer on August 21, 2022 at 10:13 am
      Solution

      The correct answer is Nitric acid.

      Key Points

      • Nitric acid:
        • ​Nitric acid (HNO3), is a highly corrosive and toxic strong mineral acid that is normally colorless but tends to acquire a yellow cast to the accumulation of oxides of nitrogen if long–stored.
        • Applications:
          • Some precious metals such as gold and platinum do not react with nitric acid  hence it is used for cleaning purpose of these metals.
          • ​Nitric acid is used in the production of ammonium nitrate for fertilizers, making plastics, and in the manufacture of dyes.
          • Nitric acid is commonly used in science laboratories at schools for experimenting when specifically testing for chloride.
          • Nitric acid has been used in various forms as the oxidizer in liquid–fueled rockets.
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