Which of the following oxide is most acidic?

Options

A. `Ag_(2)O`
B. `V_(2)O_(5)`
C. `CO`
D. `N_(2)O_(5)`

Answer

To determine which of the following oxides is the most acidic, we can follow these steps:

### Step 1: Identify the Oxides
First, we need to identify the oxides given in the question. Let's assume the oxides are:
1. \( \text{Ag}_2\text{O} \) (Silver oxide)
2. \( \text{CO}_2 \) (Carbon dioxide)
3. \( \text{N}_2\text{O}_5 \) (Dinitrogen pentoxide)
4. \( \text{V}_2\text{O}_5 \) (Vanadium pentoxide)

### Step 2: Determine the Groups and Periods
Next, we identify the groups and periods of the elements in the oxides:
- **Silver (Ag)**: Group 11, Period 4
- **Carbon (C)**: Group 14, Period 2
- **Nitrogen (N)**: Group 15, Period 2
- **Vanadium (V)**: Group 5, Period 4

### Step 3: Analyze Acidic Character
The acidic character of oxides generally increases as you move from left to right across a period and decreases as you move down a group.

- **Silver Oxide (\( \text{Ag}_2\text{O} \))**: Being a metal oxide, it is basic.
- **Carbon Dioxide (\( \text{CO}_2 \))**: This is a non-metal oxide and is acidic.
- **Dinitrogen Pentoxide (\( \text{N}_2\text{O}_5 \))**: This is also a non-metal oxide and is known to be very acidic.
- **Vanadium Pentoxide (\( \text{V}_2\text{O}_5 \))**: This is a transition metal oxide and has acidic properties, but not as strong as nitrogen oxides.

### Step 4: Compare Acidic Strength
Among the identified oxides:
- \( \text{N}_2\text{O}_5 \) is known to react with water to form \( \text{HNO}_3 \) (nitric acid), which is a strong acid.
- \( \text{CO}_2 \) forms carbonic acid (\( \text{H}_2\text{CO}_3 \)), which is weak.
- \( \text{Ag}_2\text{O} \) is basic, and \( \text{V}_2\text{O}_5 \) is less acidic than \( \text{N}_2\text{O}_5 \).

### Conclusion
Thus, the most acidic oxide among the options provided is \( \text{N}_2\text{O}_5 \).

**Final Answer**: \( \text{N}_2\text{O}_5 \) (Dinitrogen pentoxide) is the most acidic oxide.

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