Which of the following does not show similarity between boron and aluminium?

Options

A. Both form oxides of type `M_(2) O_(3)` when heated with oxygen at high temperature
B. Both dissolve in alkalies and evolve hydrogen.
C. Hydroxides of both the elements are basic in nature.
D. Both form nitrides of MN type when heated with `N_(2)`.

Explanation

To determine which of the following does not show similarity between boron and aluminum, we need to analyze the properties of both elements and their compounds. Here’s a step-by-step solution:

### Step 1: Identify the Properties of Boron and Aluminum
Boron (B) and Aluminum (Al) are both p-block elements located in group 13 of the periodic table. They exhibit some similarities in their chemical behavior due to their position in the periodic table, but there are also significant differences.

### Step 2: Compare Electrophilic Nature
Both boron and aluminum are electrophilic in nature. This means they can accept electron pairs from nucleophiles. This property is similar for both elements.

### Step 3: Analyze Hydroxides
- **Boron Hydroxide (B(OH)3)**: Boron hydroxide is acidic due to the effective overlap of the 2p orbital of boron with the lone pairs of oxygen. This results in stronger interactions and higher acidity.
- **Aluminum Hydroxide (Al(OH)3)**: Aluminum hydroxide is amphoteric and can exhibit basic properties. The 3p orbital of aluminum is larger and more diffuse, which leads to weaker interactions with oxygen lone pairs, resulting in lower acidity compared to boron hydroxide.

### Step 4: Identify the Key Difference
The key difference lies in the nature of their hydroxides:
- Boron hydroxide is acidic.
- Aluminum hydroxide is amphoteric and can be considered basic in certain conditions.

### Step 5: Conclusion
Thus, the statement that does not show similarity between boron and aluminum is that their hydroxides exhibit different acidic/basic properties.

### Final Answer
The correct option is: **Hydroxide of both elements are basic in nature.**

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