Question

Will be Marked as Brainliest if answered accurately.

1. Name the substances which remains in a test tube after heating ferrous sulphate.

Answer 1

ferrous sulphate is green in colour on heating the green colour change into dirty yellow anhydrous it looses it's water content
after heating
feso4-> fe2o3+so3+so2
so2,so3 are left as a residue (Brown colour)

Answer 2

1)..... Ferrous sulphate crystals contain water molecules (FeSO4. 7H2O). On heating, ferrous sulphate crystals lose water and anhydrous ferrous sulphate (FeSO4) is formed. So their colour changes from light green to white.

2)On further heating, anhydrous ferrous sulphate decomposes to form ferric oxide (Fe2O3), sulphur dioxide (SO2) and sulphur trioxide (SO3). So, the gas emitted smells like burning sulphur.
3)In this reaction, the single reactant FeSO4 decomposes to form three different products. So, the reaction is a decomposition reaction.