Question

An element Y exists as yellow solid, it shows catenation and allotropy? The element Y forms two types of oxides which are also the products of thermal decomposition of ferrous sulphate. These gases are the major cause of air pollution.

Write the balanced chemical equation for the thermal decomposition of ferrous sulphate.

Answer 1

Step-1: Introduction

The linkage into atoms chain of the same element is catenation.

An element that can exhibit in many different form in the alike physical state is allotropy.

The element exist as yellow solid, showing catenation and allotropy is Sulphur ($\mathrm{S}$).

Step-2: Decomposition of Ferrous sulphate

Sulphur forms Sulphur dioxide (${\mathrm{SO}}_2$) and Sulphur trioxide (${\mathrm{SO}}_3$) which are the two types of oxides.

Ferric oxide (${\mathrm{Fe}}_2{\mathrm{O}}_3$), Sulphur dioxide and Sulphur trioxide are formed by decomposing Ferrous sulphate (${\mathrm{FeSO}}_4$).

$2{\mathrm{FeSO}}_4\to {\mathrm{Fe}}_2{\mathrm{O}}_3+{\mathrm{SO}}_2+{\mathrm{SO}}_3$

Final answer

Thus, Sulphur dioxide and Sulphur trioxide are the products for decomposition of Ferrous sulphate.