How many molecules are acidic oxides among the following :
`CO, NO_(2), SO_(2), SO_(3), NO, N_(2)O, SiO_(2), Cl_(2)O_(7)`

Options

A. 4
B. 5
C. 6
D. 7

Answer

To determine how many molecules among the given list are acidic oxides, we need to analyze each oxide based on its acidic or basic nature. Acidic oxides are typically formed from non-metals and have a tendency to react with water to form acids.

The given oxides are:
1. CO (Carbon monoxide)
2. NO₂ (Nitrogen dioxide)
3. SO₂ (Sulfur dioxide)
4. SO₃ (Sulfur trioxide)
5. NO (Nitric oxide)
6. N₂O (Dinitrogen oxide)
7. SiO₂ (Silicon dioxide)
8. Cl₂O₇ (Dichlorine heptoxide)

Now, let's analyze each oxide:

1. **CO (Carbon monoxide)**: This is generally considered a neutral oxide, not acidic.

2. **NO₂ (Nitrogen dioxide)**: This is an acidic oxide. It reacts with water to form nitric acid (HNO₃).

3. **SO₂ (Sulfur dioxide)**: This is also an acidic oxide. It reacts with water to form sulfurous acid (H₂SO₃).

4. **SO₃ (Sulfur trioxide)**: This is a strong acidic oxide. It reacts with water to form sulfuric acid (H₂SO₄).

5. **NO (Nitric oxide)**: This is generally considered a neutral oxide, not acidic.

6. **N₂O (Dinitrogen oxide)**: This is also a neutral oxide, not acidic.

7. **SiO₂ (Silicon dioxide)**: This is generally considered a neutral oxide, not acidic.

8. **Cl₂O₇ (Dichlorine heptoxide)**: This is an acidic oxide. It reacts with water to form perchloric acid (HClO₄).

Now, we can summarize the acidic oxides identified:
- NO₂
- SO₂
- SO₃
- Cl₂O₇

Counting these, we find that there are **4 acidic oxides** in total.

**Final Answer**: There are 4 acidic oxides among the given molecules.

---