Balancing Oxidation-Reduction Reactions Practice Test

What is the coefficient on sulfur dioxide if the following redox reaction is balanced in an acidic solution?

![](https://vt-vtwa-assets.varsitytutors.com/vt-vtwa/uploads/formula_image/image/174232/gif.latex $"SO_{2}$ + $Cr_{2}$O_${7}^{2-}$ \rightarrow SO_${4}^{2-}$ + $Cr^{3+}$")