Which of the following has no reaction with HCI ?

Options

A. B
B. Al
C. Ga
D. Tl

Answer

To determine which of the given options has no reaction with hydrochloric acid (HCl), we will analyze each option based on their chemical properties.

### Step-by-Step Solution:

1. **Identify the Elements**:
- We need to consider the elements in the boron family, which includes boron (B), aluminium (Al), gallium (Ga), indium (In), and thallium (Tl).

2. **Analyze Boron**:
- Boron is a non-metal. Non-metals typically do not react with acids like HCl. Therefore, boron does not react with HCl.

3. **Analyze Aluminium**:
- Aluminium is a metal and can react with HCl. The reaction produces aluminium chloride and hydrogen gas:
\[ 2Al + 6HCl \rightarrow 2AlCl_3 + 3H_2 \]

4. **Analyze Gallium**:
- Gallium is also a metal and reacts with HCl similarly to aluminium, forming gallium chloride and hydrogen gas:
\[ Ga + 3HCl \rightarrow GaCl_3 + \frac{3}{2}H_2 \]

5. **Analyze Indium**:
- Indium, being a metal, reacts with HCl as well, producing indium chloride and hydrogen gas:
\[ 2In + 6HCl \rightarrow 2InCl_3 + 3H_2 \]

6. **Analyze Thallium**:
- Thallium is another metal that reacts with HCl, forming thallium chloride and hydrogen gas:
\[ Tl + 3HCl \rightarrow TlCl + \frac{3}{2}H_2 \]

7. **Conclusion**:
- Among the elements analyzed, boron is the only one that does not react with HCl. Therefore, the correct answer is boron.

### Final Answer:
The element that has no reaction with HCl is **Boron (B)**.

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