Multiple choice

Flux in metallurgy is used to remove all impurities from ores.The barium salt used as a flux is

  1. barium acetate

  2. barium borate

  3. barium carbonate

  4. barium chlorate
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Barium carbonate (BaCO3), also known as witherite, is a chemical compound used in rat poison, bricks, ceramic glazes and cement. Witherite crystallises in the orthorhombic system. It is widely used in the ceramics industry as an ingredient in glazes. It acts as a flux, a matting and crystallising agent and combines with certain colouring oxides to produce unique colours not easily attainable by other means.

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