Which of the following hydra acid exist in liquid state and can't be stored in glass bottle:-

Options

A. HF
B. HCl
C. HBr
D. HI

Answer

To determine which of the following hydra acids exists in liquid state and cannot be stored in a glass bottle, we will analyze each option provided:

1. **Hydrofluoric Acid (HF)**
2. **Hydrochloric Acid (HCl)**
3. **Hydrobromic Acid (HBr)**
4. **Hydroiodic Acid (HI)**

### Step-by-Step Solution:

**Step 1: Understand the Properties of Each Acid**
- Hydrofluoric Acid (HF): This acid is known to be a weak acid but is highly corrosive. It can react with glass.
- Hydrochloric Acid (HCl): This is a strong acid, but it does not react with glass.
- Hydrobromic Acid (HBr): This is also a strong acid and does not react with glass.
- Hydroiodic Acid (HI): This is another strong acid that does not react with glass.

**Step 2: Analyze the Interaction with Glass**
- Glass is primarily made of silica (SiO2) and other silicates.
- Hydrofluoric Acid (HF) can react with silica to form sodium silicate and hydrofluoric acid, which means it can dissolve the glass.

**Step 3: Conclusion**
- Since Hydrofluoric Acid (HF) is the only acid that reacts with glass and cannot be stored in a glass bottle, the answer is:

**Answer: Hydrofluoric Acid (HF)**