In Balancing the Equation for a Disproportionation Reaction, Using the Oxidation

Multiple Choice

In balancing the equation for a disproportionation reaction, using the oxidation number method, the substance undergoing disproportionation is ________.

A) initially written twice on the reactant side of the equation
B) initially written twice on the product side of the equation
C) initially written on both the reactant and product sides of the equation
D) always assigned an oxidation number of zero