Which of the following is acidic in nature ?

Options

A. `Be(OH)_(2)`
B. `Mg(OH)_(2)`
C. `Al(OH)_(3)`
D. `B(OH)_(3)`

Explanation

To determine which of the given compounds is acidic in nature, we will analyze each option step by step.

### Step 1: Analyze Beryllium Hydroxide (Be(OH)₂)
- Beryllium hydroxide is a compound formed from beryllium, which is an alkaline earth metal.
- Alkaline earth metal hydroxides are generally basic in nature.
- Therefore, Be(OH)₂ is **basic**.

### Step 2: Analyze Magnesium Hydroxide (Mg(OH)₂)
- Magnesium hydroxide is also formed from magnesium, another alkaline earth metal.
- Similar to beryllium hydroxide, magnesium hydroxide is basic.
- Thus, Mg(OH)₂ is **basic**.

### Step 3: Analyze Aluminum Hydroxide (Al(OH)₃)
- Aluminum hydroxide is a compound formed from aluminum, which is a post-transition metal.
- Aluminum hydroxide is known to be amphoteric, meaning it can react with both acids and bases.
- Therefore, Al(OH)₃ is **amphoteric**.

### Step 4: Analyze Orthoboric Acid (H₃BO₃)
- Orthoboric acid, also known as boric acid, is a compound that can donate protons (H⁺) in aqueous solutions.
- When boric acid is dissolved in water, it can form complexes and release H⁺ ions, which makes it acidic in nature.
- Thus, H₃BO₃ is **acidic**.

### Conclusion
After analyzing all the given compounds:
- Be(OH)₂: Basic
- Mg(OH)₂: Basic
- Al(OH)₃: Amphoteric
- H₃BO₃: Acidic

The correct answer is **H₃BO₃ (Orthoboric Acid)**, which is acidic in nature.

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