Name the gas evolved in the following case: Heating potassium chlorate in the presence of manganese dioxide

Explanation

To solve the question of naming the gas evolved when potassium chlorate is heated in the presence of manganese dioxide, we can follow these steps:

### Step 1: Identify the Reactants
We start with potassium chlorate (KClO₃) as the main reactant. The presence of manganese dioxide (MnO₂) indicates that it acts as a catalyst in the reaction.

**Hint:** Remember that a catalyst is a substance that speeds up a reaction without being consumed in the process.

### Step 2: Understand the Reaction
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