Question

.A green salt on heating decomposes to produce a colourless suffocating gas and leaves behind a brown residue. Name the salt and write the decomposition reaction.

Answer 1

The salt is Ferrous sulfate, which gives the sulfur dioxide and a mixture of iron oxides when heating. The chemical reaction is;

2FeSO  ₄   .7H  ₂  O       HEAT  ͢   Fe  ₂  O  ₃  +SO  ₃