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Identify the incorrect statement from the following
 

Option: 1

The oxidation number of \mathrm{K} in \mathrm{KO}_{2}$ is $+4.

 


Option: 2

Ionisation enthalpy of alkali metals decreases from top to bottom in the group.
 


Option: 3

Lithium is the strongest reducing agent among the alkali metals.
 


Option: 4

Alkali metals react with water to form their hydroxides.


Answers (1)

best_answer

The oxidation number of \mathrm{K} in \mathrm{KO_{2}} is \mathrm{+4}, is wrong because \mathrm{K} oxidation number is \mathrm{+1},

\mathrm{K}^{+}+\mathrm{O}_{2}^{-} \rightarrow \mathrm{KO}_{2}

         superoxide

Hence correct option is 1.

Posted by

HARSH KANKARIA

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