The formation of sulphur trioxide from sulphur dioxide and oxygen is an reaction.

Options

A. endothermic as well as redox
B. endothermic as well as precipitation
C. exothermic as well as redox
D. exothermic as well as precipitation

Explanation

To determine the type of reaction that occurs during the formation of sulfur trioxide (SO3) from sulfur dioxide (SO2) and oxygen (O2), we can follow these steps:

### Step 1: Write the Chemical Equation
The first step is to write the balanced chemical equation for the reaction.

**Chemical Equation:**
\[ 2 \, \text{SO}_2 (g) + \text{O}_2 (g) \rightarrow 2 \, \text{SO}_3 (g) \]

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