Why are dense white fumes formed when hydrogen chloride is dissolved in moist air

Explanation

### Step-by-Step Text Solution:

1. **Understanding Hydrogen Chloride**:
- Hydrogen chloride (HCl) is a gas at room temperature. When we refer to it in its gaseous form, we call it hydrogen chloride.

2. **Defining Moist Air**:
- Moist air refers to air that contains water vapor (H2O). In this context, we consider it as a mixture of gases that includes water vapor.

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