Give an example of a reaction having fractional order.

Explanation

To provide a step-by-step text solution for the question "Give an example of a reaction having fractional order," we can break it down as follows:

### Step-by-Step Solution:

1. **Understanding Reaction Order**:
- The order of a reaction is defined as the sum of the powers of the concentration terms in the rate law expression. It is an experimental quantity and cannot be deduced solely from the stoichiometry of the reaction.

2. **Identifying a Reaction**:
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