Multiple choice general knowledge science & technology

jeweler's rouge IS

  1. FERRIC OXIDE

  2. FERROUS OXIDE

  3. FERROUS SULPHATE

  4. FERRIC SULPHATE
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A Correct answer
Explanation

Jeweler's rouge is ferric oxide (Fe2O3), a fine red powder used for polishing metals and gems due to its mild abrasive properties. Ferrous oxide (FeO) is black and used as a pigment, while ferrous sulfate and ferric sulfate are different compounds used as supplements and in water treatment, not for polishing.

AI explanation

Jeweler's rouge is a fine polishing compound made of ferric oxide (iron(III) oxide, Fe2O3), prized for its ability to buff metals like gold and silver to a high shine without scratching them. Its characteristic reddish color, from which it gets the name 'rouge,' also comes from this iron oxide.

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