Sometimes it happens that when `H_(2)S ` gas is passed into solution in dii, `HCI` yellowish white turbility appears .What do you conclude ? What preperation are takes to check this turbidity?

Explanation

### Step-by-Step Solution:

1. **Understanding the Reaction**:
- When hydrogen sulfide (H₂S) gas is passed into a dilute hydrochloric acid (HCl) solution, a yellowish-white turbidity appears. This turbidity is due to the formation of colloidal sulfur.

2. **Identifying the Cause**:
- The turbidity indicates the presence of certain ions in the solution, such as nitrate (NO₃⁻), nitrite (NO₂⁻), or sulfide (S²⁻). These ions can react with H₂S and cause it to oxidize.

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