Question

The main oxides formed on combustion of $Li, Na$ and $K$ in excess of air are, respectively :

• A. $Li_2O, Na_2O$ and $KO_2$
• B. $LiO_2, Na_2O_2$ and $K_2O$
• C. $Li_2O_2, Na_2O_2$ and $KO_2$
• D. $Li_2O, Na_2O$ and $KO_2$

Answer 1

Answer: (C)

$Li_2O_2, Na_2O_2$ and $KO_2$

Answer 2

$Li \rightarrow Li _{2} O$
$Na \rightarrow Na _{2} O _{2}$
$K \rightarrow KO _{2}$