Which of the following hydroxide is acidic?

Options

A. `Al(OH)_(3)`
B. `Ga(OH)_(3)`
C. `TI(OH)_(3)`
D. `B(OH)_(3)`

Explanation

To determine which of the following hydroxides is acidic, we need to analyze the properties of each hydroxide mentioned in the options. The hydroxides can be classified as acidic, basic, or amphoteric based on their reactions with acids and bases.

### Step-by-Step Solution:

1. **Identify the Hydroxides:**
Let's assume the options provided are:
a) Aluminum hydroxide (Al(OH)₃)
b) Gallium hydroxide (Ga(OH)₃)
c) Thallium hydroxide (Tl(OH)₃)
d) Barium hydroxide (Ba(OH)₂)

2. **Analyze Aluminum Hydroxide (Al(OH)₃):**
- Aluminum hydroxide is amphoteric.
- It can react with acids (like HCl) to form aluminum chloride (AlCl₃) and water.
- It can also react with bases (like NaOH) to form sodium aluminate (NaAl(OH)₄).
- Therefore, it is not classified as acidic.

3. **Analyze Gallium Hydroxide (Ga(OH)₃):**
- Gallium hydroxide is also amphoteric.
- It reacts with acids to form gallium chloride (GaCl₃) and water.
- It can react with bases to form sodium gallate (NaGa(OH)₄).
- Thus, it is not classified as acidic.

4. **Analyze Thallium Hydroxide (Tl(OH)₃):**
- Thallium hydroxide is primarily basic.
- It does not exhibit amphoteric behavior and mainly reacts with acids.
- Therefore, it is not classified as acidic.

5. **Analyze Barium Hydroxide (Ba(OH)₂):**
- Barium hydroxide is a strong base.
- It reacts with acids to form barium salts and water.
- It does not react with bases, hence it is not classified as acidic.

6. **Identify the Acidic Hydroxide:**
- Among the options analyzed, none of the hydroxides (Al(OH)₃, Ga(OH)₃, Tl(OH)₃, Ba(OH)₂) are acidic.
- However, if we consider boric acid (H₃BO₃), which can be represented as B(OH)₃, it is a weak acid and reacts with bases to form borate salts.

7. **Conclusion:**
- The only hydroxide that can be considered acidic in nature is boric acid (H₃BO₃), which is often represented in discussions about hydroxides.

### Final Answer:
The acidic hydroxide among the options is **Boric acid (H₃BO₃)**.