Discuss whether the following phenomena are reversible?
(i) Water fall (ii) Rusting of iron
(iii) Electrolysis.

Explanation

To determine whether the given phenomena are reversible or irreversible, we will analyze each one step by step.

### Step 1: Analyze the Waterfall
1. **Description**: In a waterfall, water flows from a higher elevation to a lower elevation due to gravity.
2. **Energy Transformation**: As the water falls, its potential energy is converted into kinetic energy. When the water strikes the ground, some kinetic energy is transformed into heat and sound energy.
3. **Reversibility**: Once the water has fallen, it cannot spontaneously return to its original height without external work being done. Thus, the process of a waterfall is irreversible.

### Conclusion for Waterfall:
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