Identify the following type of reaction.
`2KCIO_3underset("catalyst")overset("heat") 2KCl_((s))+3O_(2(g))`

Options

A. It is a combination reaction.
B. It is a decomposition reaction and is accompanied by release of heat.
C. It is a photochemical decomposition reaction by release of heat.
D. It is a decomposition reaction and is endothermic in nature.

Explanation

To identify the type of reaction represented by the equation:

\[ 2KClO_3 \xrightarrow{\text{catalyst}} 2KCl + 3O_2 \]

we will analyze the components of the reaction step by step.

### Step 1: Understand the Reaction
The reaction shows potassium chlorate (KClO3) decomposing into potassium chloride (KCl) and oxygen gas (O2).

### Step 2: Identify the Type of Reaction
- **Combination Reaction**: This occurs when two or more substances combine to form a single product. In this case, we have a single reactant breaking down, so this is not a combination reaction.

- **Decomposition Reaction**: This occurs when a single compound breaks down into two or more simpler products. Since KClO3 is breaking down into KCl and O2, this fits the definition of a decomposition reaction.

### Step 3: Determine if it is Endothermic or Exothermic
- In this reaction, heat is applied to decompose KClO3. This means that energy (heat) is absorbed to break the bonds in KClO3, indicating that the reaction is endothermic.

### Conclusion
The reaction is a **decomposition reaction** and is **endothermic** in nature.

### Final Answer
The type of reaction is a **decomposition reaction** and it is **endothermic**.

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