Question

small quantity of light green coloured substance is heated .in the beginning, it loses some water
and then suffocating gas is evolved and a red residue is left behind. Answer the following:
a) Name the red residue and write its formula.
b) Name the suffocating gas or gases and write its formula.
c) Name the light green coloured substance and write its formula.

Answer 1

A.) Ferric Oxide is the residue Fe2O3(solid).

B). There are 2 suffocating gases evolved
​​​​​​ 1. Sulphur Dioxide and 2.Sulphur trioxide.

C).The light green substance is Ferrous Sulphate (FeSO​4).