Riya performs two set of experiments to study the length of the foam formed which are as follows:
Set I: she takes 10 ml of distilled water in test tube and adds 5-6 drops of liquid soap init and shakes the test tube vigorously.
Set II : she takes 10 ml of distilled water in a test tube and adds 5-6 drops of liquid soap with half spoonful of `CaSO_4` in it and shakes the test tube.
Write your observation and reason.

Explanation

### Step-by-Step Solution:

1. **Set I Observation**:
- In the first experiment (Set I), Riya adds 5-6 drops of liquid soap to 10 ml of distilled water and shakes the test tube vigorously.
- **Observation**: A significant amount of foam is formed, and the foam has a considerable length.

2. **Set II Observation**:
- In the second experiment (Set II), Riya adds 5-6 drops of liquid soap and half a spoonful of calcium sulfate (CaSO₄) to 10 ml of distilled water, then shakes the test tube vigorously.
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