II) Take about 2 g ferrous sulphate crystals in a dry boiling tube. Heat the boiling tube over the flame of a burner or spirit lamp. In this reaction you can observe that a single
reactant breaks down to give simpler products. This is a decomposition reaction.
Ferrous sulphate crystals (FeSO4, 7H2O) lose water when heated and the colour of the crystals change. It then decomposes to ferric oxide (Fe2O3), sulphur dioxide (SO2)
and sulphur trioxide (SO3). Ferric oxide is a solid, while SO2 and SO3 are gases.
Share
Answer:
The answer to the above questions are:
D
A
B
Verified answer
In the given experiment, when ferrous sulphate is heated it decomposes -
(1) The evolution of water vapor, change in color, and smell of sulphur is observed during the experiment. (OPTION D)
(2) The color of the solution changes from light green to dark brown. (OPTION A)
(3) When sulphur dioxide reacts with water it forms sulphurous acid. (OPTION B)
Explanation
DECOMPOSITION REACTION -
[tex]FeSO_4. H_2O[/tex] → [tex]Fe_2O_3 + SO_2 + SO_3[/tex]