In which property listed below hydrogen does not resemble alkali metals ?

Options

A. Tendency to form cation
B. Nature of oxide
C. Combination with halogens
D. Reducing character

Explanation

To solve the question of in which property hydrogen does not resemble alkali metals, we can follow these steps:

### Step 1: Understand the Properties of Alkali Metals
Alkali metals are known for several key properties:
- They readily lose one electron to form cations (e.g., Na⁺, K⁺).
- They react vigorously with halogens to form halides (e.g., NaCl, KBr).
- They exhibit reducing properties, meaning they can donate electrons to other substances.

### Step 2: Analyze Hydrogen's Properties
Hydrogen, while being in Group 1 of the periodic table, exhibits some similar properties:
- Hydrogen can form a cation (H⁺).
- Hydrogen can react with halogens to form hydrogen halides (e.g., HCl, HBr).
- Hydrogen can act as a reducing agent in certain reactions.

### Step 3: Identify the Key Difference
The main property where hydrogen differs from alkali metals is in the nature of its oxides:
- Alkali metals form basic oxides (e.g., Na₂O, K₂O) which are strongly basic in nature.
- Hydrogen, on the other hand, forms water (H₂O) which is neutral, and its oxides (like H₂O and H₂O₂) do not exhibit the same basic properties as alkali metal oxides.

### Conclusion
Thus, the property in which hydrogen does not resemble alkali metals is the **nature of oxides**.

### Final Answer
The correct answer is: **Nature of oxide is different.**

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