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Which one of the following acid is used by goldsmith for cleaning of gold and silver articles ?

Options

  1. ASulphuric acid
  2. BNitric acid
  3. CHydrochloric acid
  4. DPhosphoric acid

Correct answer

B. Nitric acid

Step-by-step solution

Nitric acid ( HNO ₃ ) , is a very reactive, highly corrosive, strong oxidizing agent but it does not react with less reactive metals like gold and silver hence it is used by goldsmiths for cleaning gold and silver articles. Its is also used in production of fertilizers, making of dyes, in school laboratory and as an oxidizer in liquid fueled rockets.

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