Ferrous sulphate decomposes with the evolution of a gas having a characteristic odour of burning sulphur. Write the chemical reaction involved and identify the type of reaction.

Explanation

The chemical reaction is an example of thermal decomposition reaction.
`2FeSO_(4)(s) overset("heat")to Fe_(2)O_(3)(s) + SO_(2)(g) + SO_(3)(g)`
The gases evolved are mixture of sulphur dioxide and sulphur trioxide. Both have the smell of burning sulphur.