Question

List any two observations when Ferrous Sulphate is heated in a dry test tube?​

Answer 1

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7H2O). On heating, ferrous sulphate crystals lose water and anhydrous ferrous sulphate (FeSO4) is formed. So their colour changes from light green to white. On further heating, anhydrous ferrous sulphate decomposes to form ferric oxide (Fe2O3), sulphur dioxide (SO2) and sulphur trioxide (SO3).

Answer 2

• Initial light green colour changes to reddish brown colour

• Colourless gas is evolved

• Gas with choking smell is evolved