Question

what type of reaction is the following: 2ki -> 2k + i₂
options: decomposition, single replacement, combination, double replacement, combustion

Explanation:

A decomposition reaction is one where a single compound breaks down into two or more simpler substances. The reaction \(2KI
ightarrow 2K + I_2\) shows potassium iodide (a single compound) breaking into potassium and iodine, fitting the decomposition reaction definition. Single replacement involves one element replacing another in a compound, combination is combining substances, double replacement is two compounds exchanging ions, and combustion involves reacting with oxygen, none of which match here.

Answer:

Decomposition (the option labeled "Decomposition" among the choices)