On heating `NaNO_(3)` gives:

Options

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

Answer

To solve the question regarding the thermal decomposition of sodium nitrate (NaNO₃), we will analyze the process step by step.

### Step 1: Understand the Composition of Sodium Nitrate
Sodium nitrate (NaNO₃) is composed of sodium ions (Na⁺) and nitrate ions (NO₃⁻). When heated, it undergoes a decomposition reaction.

**Hint:** Remember that nitrates generally decompose upon heating.

### Step 2: Identify the Temperature for Decomposition
Sodium nitrate begins to decompose at around 500 degrees Celsius. This is an important temperature to note for the reaction to occur.

**Hint:** Look for the temperature at which the decomposition reaction is initiated.

### Step 3: Write the Decomposition Reaction
Upon heating, sodium nitrate decomposes to form sodium nitrite (NaNO₂) and oxygen gas (O₂). The balanced chemical equation for this reaction is:

\[ 2 \text{NaNO}_3 (s) \rightarrow 2 \text{NaNO}_2 (s) + \text{O}_2 (g) \]

**Hint:** Consider the products formed during the decomposition of nitrates.

### Step 4: Identify the Products
From the decomposition reaction, we see that the products are sodium nitrite (NaNO₂) and oxygen gas (O₂).

**Hint:** Focus on the products formed during the thermal decomposition of sodium nitrate.

### Step 5: Conclusion
Thus, when sodium nitrate (NaNO₃) is heated, it decomposes to form sodium nitrite (NaNO₂) and oxygen gas (O₂).

**Final Answer:** On heating NaNO₃, it gives NaNO₂ and O₂.

### Summary of Steps:
1. Understand the composition of sodium nitrate.
2. Identify the decomposition temperature.
3. Write the balanced decomposition reaction.
4. Identify the products formed.
5. Conclude with the final answer.