What do you observe when : Opening the soda water bottle.

Explanation

**Step-by-Step Text Solution:**

1. **Observation of the Soda Water Bottle:** When you open a soda water bottle, you will notice a few key things happening simultaneously.

2. **Sound Emission:** The first thing you will hear is a hissing sound. This sound is produced due to the rapid release of gas when the bottle is opened.

3. **Spillage of the Liquid:** Along with the hissing sound, you may also observe that the liquid inside the bottle spills out. This is often due to the sudden release of pressure.

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