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NEET levelSingle correct optionDifficulty 1 of 3sb056

When lithium burns in excess dry air, the principal oxide formed is

Aan equimolar mixture of $Li X_{2} O X_{2}$ and $LiO X_{2}$
B $LiO X_{2}$
C $Li X_{2} O X_{2}$
D $Li X_{2} O$

Answer: D

Li+ is so small and so strongly polarising that it cannot stabilise the large peroxide or superoxide anions. Lithium therefore gives the normal oxide

Li X_{2} O

even in excess oxygen.

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