Question

explain charcoal cavity test

Answer 1

Charcoal Cavity Test. This test is based on the fact that metallic carbonates when heated in a charcoal cavity decomposes to give corresponding oxides. The oxides appear as coloured incrustation or residue in the cavity.

Answer 2

Charcoal cavity test is a part of preliminary qualitative inorganic analysis. It is performed by mixing the given salt with sodium carbonate and heating the mixture on the block of charcoal with the help of blow pipe in reducing flame. The salt gets converted to respective oxides having characteristics colors.