Given below are the oxides :
`Na_(2)O, As_2O_3, N_2O, NO and Cl_2O_7` Number of amphoteric oxides is : Question:

Options

A. 0
B. 1
C. 2
D. 3

Answer

To determine the number of amphoteric oxides among the given oxides (Na₂O, As₂O₃, N₂O, NO, and Cl₂O₇), we will analyze each oxide based on its chemical properties and oxidation states.

### Step-by-Step Solution:

1. **Identify the Oxides:**
The oxides provided are:
- Na₂O
- As₂O₃
- N₂O
- NO
- Cl₂O₇

2. **Analyze Na₂O:**
- Sodium (Na) has an oxidation state of +1.
- Sodium oxides are generally basic because sodium is an alkali metal and tends to lose its single valence electron.
- **Conclusion:** Na₂O is a basic oxide.

3. **Analyze As₂O₃:**
- Arsenic (As) has an oxidation state of +3 in As₂O₃.
- Arsenic can exhibit both acidic and basic behavior, depending on the reaction conditions, as it can either accept or donate electrons.
- **Conclusion:** As₂O₃ is an amphoteric oxide.

4. **Analyze N₂O:**
- Nitrous oxide (N₂O) has nitrogen in a +1 oxidation state.
- N₂O is considered a neutral oxide, which does not exhibit acidic or basic properties.
- **Conclusion:** N₂O is a neutral oxide.

5. **Analyze NO:**
- Nitric oxide (NO) has nitrogen in a +2 oxidation state.
- Similar to N₂O, NO is also a neutral oxide and does not show acidic or basic properties.
- **Conclusion:** NO is a neutral oxide.

6. **Analyze Cl₂O₇:**
- In dichlorine heptoxide (Cl₂O₇), chlorine has an oxidation state of +7.
- Chlorine oxides are typically acidic because chlorine is a halogen and tends to accept electrons.
- **Conclusion:** Cl₂O₇ is an acidic oxide.

7. **Count the Amphoteric Oxides:**
- From the analysis, the only amphoteric oxide among the given options is As₂O₃.
- Therefore, the total number of amphoteric oxides is **1**.

### Final Answer:
The number of amphoteric oxides among the given options is **1** (As₂O₃).

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