Average rate of reaction \(2 SO_{2 (g)} + O_{2 (g)} \rightarrow 2 SO_{3 (g)}\) is written as :
1
\(\dfrac{\triangle[SO_2]}{\triangle t}\)
2
\(\dfrac{\triangle[SO_2]}{\triangle t}\)
3
\(\dfrac{1}{2}\dfrac{\triangle[SO_2]}{\triangle t}\)
4
\(\dfrac{\triangle[SO_3]}{\triangle t}\)