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

Options

A. `Li_(2)O,Na_(2)O_(2)` and `K_(2)O`
B. `Li_(2)O_(2),Na_(2)O_(2)` and `KO_(2)`
C. `Li_(2)O,Na_(2)O_(2)` and `KO_(2)`
D. `Li_(2)O,Na_(2)O` and `KO_(2)`

Answer

C

Explanation

`Li + underset("(excess)")(O_(2)(g)) to Li_(2)O`
`Na+ underset("(excess) ")(O_(2)(g)) to Na_(2)O_(2)`
`K + underset("(excess)")(O_(2)(g))to KO_(2)`