Question

A green coloured crystals on heating produces a smell of burning sulphur.
(a) identity the green coloured crystals.
(b) write the chemical equation for the reaction.
(c) identity the type of reaction.
(d) why the small of burning sulphur is observed.

Answer 1

(a) Ferrous sulphate

(b)Feso4-----> Fe2O3+So2+So3

Ferrous sulphate on heating gives ferric oxide ,sulphur dioxide & sulphur trioxide.

(C)the reaction taken place is a decomposition reaction...since energy in the form of heat is absorbed it's also an endothermic reaction.

(d) smell of burning sulphur is observed as Ferrous sulphate decomposes to sulphur dioxide and trioxide which are gases.

Hope it helps! :)