Multiple choice

The decomposition of ferric hydroxide in to ferric oxide and water vapour is an example of

  1. Drying

  2. Calcining

  3. Roasting

  4. Smelting

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Calcining is thermal decomposition of a material. Examples include decomposition of hydrates such as ferric hydroxide in to ferric oxide and water vapour, or decomposition of calcium carbonate in to calcium oxide and carbon dioxide and or of iron carbonate in to iron oxide.