When a green iron salt is heated strongly, its colour finally changes to brown and odour of burning sulphur is given out. (a) Name the iron salt. (b) Name the type of reaction that takes place during the heating of iron salt. Write a chemical equation for the reaction involved.
ChemistryClass 10ICSEAnswered 27 Mar 2026
Answer
- Ferrous
- Decomposition
Ferrous sulphate crystal loses water and forms anhydrous ferrous sulphate and further decomposes to form ferric oxide, sulphur dioxide and sulphur trioxide
- 2FeSO4→ Fe2O3 + SO2+ SO3