A) $ 2Li_2O\xrightarrow[673K]{heat}Li_2O_2+2Li $
B) $ 2K_2O\xrightarrow[673K]{heat}K_2O_2+2K $
C) $ 2Na_2O\xrightarrow[673K]{heat}Na_2O_2+2Na $
D) $ 2Rb_2O\xrightarrow[673K]{heat}Rb_2O_2+2Rb $
Correct Answer: A
[a] Lithium does not form peroxide.
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