Identify the incorrect statement from the following

5 2022 The s-Block ElementsGeneral Characteristics of Alkali Metals Medium
Identify the incorrect statement from the following
A Lithium is the strongest reducing agent among the alkali metals.
B Alkali metals react with water to form their hydroxides.
C The oxidation number of K in $KO_2$ is +4.
D Ionisation enthalpy of alkali metals decreases from top to bottom in the group.

Detailed Solution

$KO_2$ is potassium superoxide: $K^+O_2^-$ (superoxide ion $O_2^-$). So the oxidation number of K in $KO_2$ is +1, not +4 – this statement is incorrect.

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