The mainoxides formed on combusting of \(\mathrm{Li}, \mathrm{Na}\) and
\(\mathrm{K}\) in excess of air are respectively?
(a) \(\mathrm{LiO}_{2} \mathrm{Na}_{2} \mathrm{O}_{2}\) and \(\mathrm{K}_{2}
\mathrm{O}\)
(b) \(\mathrm{Li}_{2} \mathrm{O}_{2} \mathrm{Na}_{2} \mathrm{O}_{2}\) and
\(\mathrm{KO}_{2}\)
(c) \(\mathrm{Li}_{2} \mathrm{O} \mathrm{Na}_{2} \mathrm{O}_{2}\) and
\(\mathrm{KO}_{2}\)
(d) \(\mathrm{Li}_{2} \mathrm{O} \mathrm{Na}_{2} \mathrm{O}\) and
\(\mathrm{KO}_{2}\)
