2g ferrous sulphate crystal are heated in a dry boiling tube.
(i) List any two observations.
(ii) Name the type of chemical reaction taking place.
(iii) Write the chemical equation of the reaction.

Explanation

(i) Before heating, it is pale green .
After heating it is brown or reddish brown.
Two observations are :
(a) Change in state and colour
(b) Evolution of gas.
(ii) Decomposition reaction.
(iii) `2FeSO_(4)(s) overset ("Heat")rarr Fe_(2)O_(3)(s)+SO_(2)g+SO_(3)(g)`