Question

When green coloured crystals of ferrous sulphate are heated, we can smell the
characteristic odour of burning sulphur. Write balance chemical equation for this
reaction. Also write the smell is of which compounds ?​

Answer 1

Answer:

On heating, ferrous sulphate crystals lose water. So their colour changes from light green to white due to the formation of anhydrous ferrous sulphate (FeSO4). When ferrous sulphate is heated, it gives ferric oxide, sulphur dioxide and sulphur trioxide.

Answer 2

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Ferrous sulphate on heating decomposes to produce ferric oxide, sulphur dioxide and sulphur trioxide. The balanced equation for this thermal decomposition reaction can be written as: 2FeSO4(s)→heatFe2O3(s)+SO2(g)+SO3(g)