8.7—A disproportionation reaction involves an element in a single species being simultaneously oxidised and reduced

Understand that a disproportionation reaction involves an element in a single species being simultaneously oxidised and reduced.

Use —a disproportionation reaction involves an element in a single species being simultaneously oxidised and reduced to connect the rule to the data and decision in the question.

This matters because —a disproportionation reaction involves an element in a single species being simultaneously oxidised and reduced determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —a disproportionation reaction involves an element in a single species being simultaneously oxidised and reduced to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: —A disproportionation reaction involves an element in a single species being simultaneously oxidised and reduced is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.