Question

Decomposition of ferrous sulphate is a/an:

• A. precipitation reactions
• B. exothermic reactions
• C. endothermic reactions
• D. Synthesis reactions

Answer 1

The correct option is C endothermic reactions

Decomposition of ferrous sulphate is an endothermic reaction as it involves absorption of heat to form ferric oxide ($F{e}_2{O}_3$), sulphur dioxide ($S{O}_2$) and sulphur trioxide ($S{O}_3$). The equation for this reaction can be written as:
$2FeS{O}_4\left(s\right)\stackrel{heat}{\to }F{e}_2{O}_3\left(s\right)+S{O}_2\left(g\right)+S{O}_3\left(g\right)$