Question

Why is the electrolysis of water called a decomposition reaction?

Answer 1

Definition of a decomposition reaction:
A decomposition reaction is a type of chemical reaction in which a single compound breaks down into two or more simpler substances.

Electrolysis of water:
During the electrolysis of water, an electric current is passed through water, causing it to break down into its constituent elements:
H₂O → H₂ + O₂

Explanation:
- Water (H₂O) is a single compound.
- When electricity is passed through it, it breaks down into hydrogen gas (H₂) and oxygen gas (O₂).
- This breakdown of a single compound into simpler substances is the basic characteristic of a decomposition reaction.

Conclusion:
The electrolysis of water is called a decomposition reaction because it involves the breakdown of water into hydrogen and oxygen gases, which are simpler substances.