Non-metals combine with oxygen to form usually

Options

A. Basic oxides
B. Neutral oxides
C. Acidic oxides
D. Amphoteric oxides

Answer

To answer the question "Non-metals combine with oxygen to form usually," we can follow these steps:

### Step 1: Understand the Types of Oxides
First, we need to understand the different types of oxides that can be formed when elements combine with oxygen. The main types are:
- Basic oxides (typically formed by metals)
- Acidic oxides (typically formed by non-metals)
- Neutral oxides
- Amphoteric oxides

### Step 2: Identify Non-Metals
Next, we identify what non-metals are. Non-metals include elements such as carbon, sulfur, nitrogen, and oxygen itself.

### Step 3: Analyze Non-Metal and Oxygen Reactions
When non-metals react with oxygen, they tend to form acidic oxides. For example:
- Carbon (C) combines with oxygen (O2) to form carbon dioxide (CO2), which is an acidic oxide.
- Sulfur (S) combines with oxygen to form sulfur dioxide (SO2), which is also an acidic oxide.

### Step 4: Compare with Other Oxide Types
Now, we compare the acidic oxides formed by non-metals with the other types of oxides:
- Basic oxides are formed by metals (e.g., calcium oxide, magnesium oxide).
- Neutral oxides (e.g., carbon monoxide (CO), nitrogen monoxide (NO)) do not typically result from non-metal and oxygen reactions.
- Amphoteric oxides can react as both acids and bases (e.g., zinc oxide), but they are not typically formed by non-metals.

### Step 5: Conclusion
Based on the analysis, we conclude that non-metals usually combine with oxygen to form acidic oxides. Therefore, the correct answer is:
**Acidic oxide.**

### Final Answer
Non-metals combine with oxygen to form usually **acidic oxides**.

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