Question

The following equation is the example of which reactions?

2FeSO₄ → Fe₂O₃ + SO2 + SO₃

1. Combination reaction
2. Decomposition reactions
3. Displacement reactions
4. Double displacement reactions

Answer 1

Correct Answer - Option 2 : Decomposition reactions

The correct answer is 2 i.e. Decomposition reactions.

Decomposition reaction:

• Those reactions in which a compound splits up into two or more simpler substances are known as decomposition reactions.
• The decomposition reactions are carried out by applying heat, light or electricity.
• Heat, light, or electricity provide energy that breaks a compound into two or more simpler compounds. 
• A decomposition reaction is the opposite of a combination reaction. 
• Thermal decomposition:
  • ​When a decomposition reaction is carried out by heating, it is called 'thermal decomposition'.
  • The decomposition reaction of calcium carbonate into calcium oxide and carbon dioxide is an example of thermal decomposition.
• Example:
  • ​2FeSO₄ → Fe₂O₃ + SO₂ + SO₃