Give suitable reason(s) for each of the following:
In the Fountain experiments with ammonia and hydrogen chloride, water is added into the Flask with a dropper but not in case of HCl.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Fountain Experiment**: The fountain experiment is designed to demonstrate the solubility of gases in water. In this case, we are comparing the solubility of ammonia (NH₃) and hydrogen chloride (HCl).

2. **Behavior of HCl in Water**: When HCl gas is introduced into water, it is highly soluble. This means that when water is added to the flask containing HCl, the gas readily dissolves, creating a low pressure inside the flask. This low pressure allows the water to be drawn up into the flask, resulting in the formation of a 'fountain' effect.

3. **Reason for Adding Water in HCl Case**: Since HCl is highly soluble in water, adding water helps to demonstrate this property. The dissolution of HCl in water is accompanied by a significant decrease in pressure, which is essential for the fountain effect to occur.

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