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The main oxides formed on combustion of ...

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

A

`LiO_2 , 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`

Text Solution

Verified by Experts

The correct Answer is:
C
The stability of the oxide of alkali metals depends upon the comparability of size of cation and anion.
Therefore the main oxide of alkali metals formed on excess of air are as follows :
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