Question

When the green salt of iron is heated rapidly, its color eventually becomes black and it smells of burning, tell the name of iron salt and write chemical equation for reaction.

Answer 1

1) Ferrous Sulphate

2) Thermal decomposition

3) 2 FeSO4 (s)   Heat → Fe2O3 (s)+ SO2 (g) + SO3 (g)
        Ferrous sulphate            Ferric oxide
       Green Colored                 Reddish brown