`NaNO_(3)` on heating gives

Options

A. `O_(2)`
B. `NO_(2)`
C. `O_(2)+NO_(2)`
D. `NaNO_(2)`

Answer

To solve the question regarding the decomposition of sodium nitrate (NaNO₃) upon heating, we can follow these steps:

### Step 1: Understand the Decomposition Reaction
When sodium nitrate (NaNO₃) is heated, it undergoes a decomposition reaction. Decomposition reactions involve a single compound breaking down into two or more products.

### Step 2: Write the Decomposition Equation
The decomposition of sodium nitrate can be represented by the following chemical equation:
\[ 2 \text{NaNO}_3 (s) \rightarrow 2 \text{NaNO}_2 (s) + \text{O}_2 (g) \]
This equation shows that two moles of sodium nitrate decompose to form two moles of sodium nitrite (NaNO₂) and one mole of oxygen gas (O₂).

### Step 3: Identify the Products
From the decomposition reaction, we can identify the products formed:
- Sodium nitrite (NaNO₂)
- Oxygen gas (O₂)

### Step 4: Analyze the Options
Now, let's analyze the options given in the question:
1. Oxygen
2. Nitrogen Dioxide
3. Oxygen plus Nitrogen Dioxide
4. Sodium Nitrite (NaNO₂)

From our reaction, we see that the products are sodium nitrite and oxygen. Therefore:
- Option 1 (Oxygen) is correct.
- Option 4 (Sodium Nitrite) is also correct.
- Option 2 (Nitrogen Dioxide) and Option 3 (Oxygen plus Nitrogen Dioxide) are not correct as they do not appear in the products of the reaction.

### Conclusion
The correct answers to the question are:
- Option 1: Oxygen
- Option 4: Sodium Nitrite (NaNO₂)