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In the excess of air, the major oxides f...

In the excess of air, the major oxides formed by Li, Na and K are `Li_(2)O, Na_(2)O_(2)` and `KO_(2)` respectively. Arrange all the given oxides in the decreasing order of their stability.

A

`Li_(2)O gt Na_(2)O_(2)gt KO_(2)`

B

`KO_(2)gt Na_(2)O_(2)gt Li_(2)O`

C

`Na_(2)O_(2)gt KO_(2)gt Li_(2)O`

D

`Li_(2)O gt KO_(2)gt Na_(2)O_(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
The increasing stability of the peroxide or superoxide, as the size of the metal ion increases, is due to the stabilisation of large anions by larger cations.
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