Which pair of oxides is acidic in nature?

Options

A. `B_(2)O_(3),CaO`
B. `B_(2)O_(3),SiO_(2)`
C. `N_(2)O,BaO`
D. `CaO,SiO_(2)`

Answer

To determine which pair of oxides is acidic in nature, we can follow these steps:

### Step 1: Understand Oxide Classification
Oxides can be classified into four main categories:
1. **Acidic Oxides**: These oxides react with water to form acids. Examples include SiO2 (silicon dioxide) and B2O3 (boron trioxide).
2. **Basic Oxides**: These oxides react with water to form bases. Examples include Na2O (sodium oxide), BaO (barium oxide), and CaO (calcium oxide).
3. **Amphoteric Oxides**: These oxides can react both as acids and bases. Examples include ZnO (zinc oxide) and Al2O3 (aluminum oxide).
4. **Neutral Oxides**: These do not exhibit acidic or basic properties.

### Step 2: Analyze the Given Options
We need to analyze the oxides provided in the options to identify which ones are acidic:
- **Na2O**: Basic oxide
- **BaO**: Basic oxide
- **CaO**: Basic oxide
- **SiO2**: Acidic oxide
- **B2O3**: Acidic oxide

### Step 3: Identify Acidic Pairs
From the analysis:
- The oxides that are acidic are SiO2 and B2O3.
- The other oxides (Na2O, BaO, CaO) are basic.

### Step 4: Conclusion
The pair of oxides that is acidic in nature is **SiO2 and B2O3**.

### Final Answer
The correct answer is the pair **SiO2 and B2O3**.

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