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The main oxides of Li, Na and K are formed when they are burnt in excess of air<br>i) Li - ___________ ii) Na - ___________ iii) K - ___________
Correct Answer: 0
PLACEHOLDER ANSWER - the answer is three formulas. In excess air lithium forms the normal oxide $$\text{Li}_2\text{O}$$, sodium forms the peroxide $$\text{Na}_2\text{O}_2$$, and potassium forms the superoxide $$\text{KO}_2$$. Larger cations stabilise the larger peroxide and superoxide anions.
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