Answerr the following quesdons:
What is the nature of chemical changes which takes place as a result of the chemical effect of an electric current?

Explanation

### Step-by-Step Solution:

1. **Understanding Chemical Changes**: The chemical effect of electric current refers to the changes that occur in substances when an electric current passes through them. These changes are typically irreversible and involve the breaking and forming of chemical bonds.

2. **Evolution of Gas**: One of the primary chemical changes that can be observed is the evolution of gases. For example, when electric current is passed through water (H₂O), it undergoes electrolysis, resulting in the decomposition of water into hydrogen (H₂) and oxygen (O₂) gases. This is a clear indication of a chemical change, as new substances are formed.

3. **Deposition of Metals**: Another significant change is the deposition of metals. This occurs during processes like electroplating, where an electric current is used to deposit a layer of metal onto a surface. For instance, when a current passes through a solution containing metal ions, those ions can be reduced and deposited as solid metal on the cathode.

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