Question

On heating the pale green coloured crystals of ferrous sulphate undergo decomposition. A mixture of.,------------and--------gases formed.
A residue of........... colour remain in the test tube.

Answer 1

$so \frac{} {2} andso \frac{}{3 } \: \: \: gases$

Answer 2

1. Ferrous Oxide.

2. Oxygen gas.

3. Red Colour.