Correct the following if required:
`NaNO_3` gives `NO_2` and `O_2` on heating.

Explanation

To correct the statement "NaNO3 gives NO2 and O2 on heating," we need to analyze the decomposition reaction of sodium nitrate (NaNO3) when it is heated.

### Step-by-Step Solution:

1. **Identify the Reactant**: The reactant in this case is sodium nitrate (NaNO3).

2. **Understand the Decomposition Reaction**: When sodium nitrate is heated, it undergoes a decomposition reaction. The expected products of this reaction are sodium nitrite (NaNO2) and oxygen gas (O2).

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