Question

Identify the incorrect statement from the following

• A. Lithium is the strongest reducing agentamong 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.

Answer 1

Answer: (C)

$KO _{2}$
$K ^{+} O _{2}^{-}\left( O _{2}^{-}-\right.$superoxide ion$)$