Question:
On combustion of $\mathrm{Li}, \mathrm{Na}$ and $\mathrm{K}$ in excess of air, the major oxides formed, respectively, are :
Correct Option: , 2
Solution:
On heating in excess air Li form oxide sodium form peroxide while $\mathrm{K}, \mathrm{Rb}, \mathrm{Cs}$ form superoxide.
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